diff --git a/src/d_player.h b/src/d_player.h
index 3529189b..f184d4cf 100644
--- a/src/d_player.h
+++ b/src/d_player.h
@@ -318,6 +318,7 @@ typedef enum
 	k_eggmanheld,			// Eggman monitor held, separate from k_itemheld so it doesn't stop you from getting items
 	k_bananadrag,			// After a second of holding a banana behind you, you start to slow down 
 	k_spinouttimer,			// Spin-out from a banana peel or oil slick (was "pw_bananacam")
+	k_wipeoutslow,			// Timer before you slowdown when getting wiped out
 	k_justbumped,			// Prevent players from endlessly bumping into each other
 	k_comebacktimer,		// Battle mode, how long before you become a bomb after death
 	k_sadtimer,				// How long you've been sad
diff --git a/src/dehacked.c b/src/dehacked.c
index 0da5c25e..1c2ac477 100644
--- a/src/dehacked.c
+++ b/src/dehacked.c
@@ -6277,6 +6277,13 @@ static const char *const STATE_LIST[] = { // array length left dynamic for sanit
 	"S_INVULNFLASH3",
 	"S_INVULNFLASH4",
 
+	// Wipeout dust trail
+	"S_WIPEOUTTRAIL1",
+	"S_WIPEOUTTRAIL2",
+	"S_WIPEOUTTRAIL3",
+	"S_WIPEOUTTRAIL4",
+	"S_WIPEOUTTRAIL5",
+
 	//{ Eggman Monitor
 	"S_FAKEITEM1",
 	"S_FAKEITEM2",
@@ -7147,6 +7154,7 @@ static const char *const MOBJTYPE_LIST[] = {  // array length left dynamic for s
 	"MT_SNEAKERTRAIL",
 	"MT_SPARKLETRAIL",
 	"MT_INVULNFLASH",
+	"MT_WIPEOUTTRAIL",
 	"MT_DRIFT",
 	"MT_DRIFTDUST",
 
@@ -7628,6 +7636,7 @@ static const char *const KARTSTUFF_LIST[] = {
 	"EGGMANHELD",
 	"BANANADRAG",
 	"SPINOUTTIMER",
+	"WIPEOUTSLOW",
 	"JUSTBUMPED",
 	"COMEBACKTIMER",
 	"SADTIMER",
diff --git a/src/doomstat.h b/src/doomstat.h
index aa490356..8f1469a3 100644
--- a/src/doomstat.h
+++ b/src/doomstat.h
@@ -416,6 +416,7 @@ extern INT32 sneakertime;
 extern INT32 itemtime;
 extern INT32 comebacktime;
 extern INT32 bumptime;
+extern INT32 wipeoutslowtime;
 extern INT32 wantedreduce;
 extern INT32 wantedfrequency;
 
diff --git a/src/g_game.c b/src/g_game.c
index 5161c8a7..a652e83f 100644
--- a/src/g_game.c
+++ b/src/g_game.c
@@ -215,6 +215,7 @@ INT32 sneakertime = TICRATE + (TICRATE/3);
 INT32 itemtime = 8*TICRATE;
 INT32 comebacktime = 10*TICRATE;
 INT32 bumptime = 6;
+INT32 wipeoutslowtime = 20;
 INT32 wantedreduce = 5*TICRATE;
 INT32 wantedfrequency = 10*TICRATE;
 
diff --git a/src/info.c b/src/info.c
index 2c7b785d..d30a2d17 100644
--- a/src/info.c
+++ b/src/info.c
@@ -55,11 +55,11 @@ char sprnames[NUMSPRITES + 1][5] =
 	"GWLR","SRBA","SRBB","SRBC","SRBD","SRBE","SRBF","SRBG","SRBH","SRBI",
 	"SRBJ","SRBK","SRBL","SRBM","SRBN","SRBO",
 	//SRB2kart Sprites
-	"SPRG","BSPR","RNDM","RPOP","KFRE","KINV","KINF","DRIF","DUST","FITM",
-	"BANA","GSHE","JAWZ","SSMN","KRBM","BHOG","BLIG","LIGH","SINK","SITR",
-	"KBLN","DEZL","POKE","AUDI","DECO","DOOD","SNES","GBAS","SPRS","BUZB",
-	"CHOM","SACO","CRAB","SHAD","BRNG","BUMP","FLEN","CLAS","PSHW","ARRO",
-	"ITEM","ITMI","ITMN","WANT","PBOM","VIEW"
+	"SPRG","BSPR","RNDM","RPOP","KFRE","KINV","KINF","WIPD","DRIF","DUST",
+	"FITM","BANA","GSHE","JAWZ","SSMN","KRBM","BHOG","BLIG","LIGH","SINK",
+	"SITR","KBLN","DEZL","POKE","AUDI","DECO","DOOD","SNES","GBAS","SPRS",
+	"BUZB","CHOM","SACO","CRAB","SHAD","BRNG","BUMP","FLEN","CLAS","PSHW",
+	"ARRO","ITEM","ITMI","ITMN","WANT","PBOM","VIEW"
 };
 
 // Doesn't work with g++, needs actionf_p1 (don't modify this comment)
@@ -2603,6 +2603,12 @@ state_t states[NUMSTATES] =
 	{SPR_KINF, FF_FULLBRIGHT|FF_TRANS90|1, 1, {NULL}, 0, 0, S_INVULNFLASH4},	// S_INVULNFLASH3
 	{SPR_NULL, FF_FULLBRIGHT|FF_TRANS90, 1, {NULL}, 0, 0, S_INVULNFLASH1},	// S_INVULNFLASH4
 
+	{SPR_WIPD, 0, 3, {NULL}, 0, 0, S_WIPEOUTTRAIL2}, // S_WIPEOUTTRAIL1
+	{SPR_WIPD, 1, 3, {NULL}, 0, 0, S_WIPEOUTTRAIL3}, // S_WIPEOUTTRAIL2
+	{SPR_WIPD, 2, 3, {NULL}, 0, 0, S_WIPEOUTTRAIL4}, // S_WIPEOUTTRAIL3
+	{SPR_WIPD, 3, 3, {NULL}, 0, 0, S_WIPEOUTTRAIL5}, // S_WIPEOUTTRAIL4
+	{SPR_WIPD, 4, 3, {NULL}, 0, 0, S_NULL}, // S_WIPEOUTTRAIL5
+
 	{SPR_FITM,  0|FF_FULLBRIGHT,   3, {NULL}, 0, 0, S_FAKEITEM2},  // S_FAKEITEM1
 	{SPR_FITM,  1|FF_FULLBRIGHT,   3, {NULL}, 0, 0, S_FAKEITEM3},  // S_FAKEITEM2
 	{SPR_FITM,  2|FF_FULLBRIGHT,   3, {NULL}, 0, 0, S_FAKEITEM4},  // S_FAKEITEM3
@@ -14409,6 +14415,33 @@ mobjinfo_t mobjinfo[NUMMOBJTYPES] =
 		S_NULL					// raisestate
 	},
 
+	{           // MT_WIPEOUTTRAIL
+		-1,              // doomednum
+		S_WIPEOUTTRAIL1, // spawnstate
+		1,               // spawnhealth
+		S_NULL,          // seestate
+		sfx_None,        // seesound
+		8,               // reactiontime
+		sfx_None,        // attacksound
+		S_NULL,          // painstate
+		0,               // painchance
+		sfx_None,        // painsound
+		S_NULL,          // meleestate
+		S_NULL,          // missilestate
+		S_NULL,          // deathstate
+		S_NULL,          // xdeathstate
+		sfx_None,        // deathsound
+		8,               // speed
+		14*FRACUNIT,     // radius
+		14*FRACUNIT,     // height
+		0,               // display offset
+		100,             // mass
+		0,               // damage
+		sfx_None,        // activesound
+		MF_NOBLOCKMAP|MF_NOCLIP|MF_NOCLIPHEIGHT|MF_NOGRAVITY|MF_SCENERY, // flags
+		S_NULL           // raisestate
+	},
+
 	{           // MT_DRIFT
 		-1,             // doomednum
 		S_DRIFTSPARK1,  // spawnstate
diff --git a/src/info.h b/src/info.h
index 56dd4b19..31f71ad0 100644
--- a/src/info.h
+++ b/src/info.h
@@ -584,6 +584,7 @@ typedef enum sprite
 	SPR_KFRE, // Sneaker fire trail
 	SPR_KINV, // Invincibility sparkle trail
 	SPR_KINF, // Invincibility flash
+	SPR_WIPD, // Wipeout dust trail
 	SPR_DRIF, // Drift Sparks
 	SPR_DUST, // Drift Dust
 
@@ -3115,6 +3116,13 @@ typedef enum state
 	S_INVULNFLASH3,
 	S_INVULNFLASH4,
 
+	// Wipeout dust trail
+	S_WIPEOUTTRAIL1,
+	S_WIPEOUTTRAIL2,
+	S_WIPEOUTTRAIL3,
+	S_WIPEOUTTRAIL4,
+	S_WIPEOUTTRAIL5,
+
 	//{ Eggman Monitor
 	S_FAKEITEM1,
 	S_FAKEITEM2,
@@ -4002,6 +4010,7 @@ typedef enum mobj_type
 	MT_SNEAKERTRAIL,
 	MT_SPARKLETRAIL,
 	MT_INVULNFLASH,
+	MT_WIPEOUTTRAIL,
 	MT_DRIFT,
 	MT_DRIFTDUST,
 
diff --git a/src/k_kart.c b/src/k_kart.c
index 79ca8991..8bb2d5e1 100644
--- a/src/k_kart.c
+++ b/src/k_kart.c
@@ -930,11 +930,46 @@ static void K_KartItemRoulette(player_t *player, ticcmd_t *cmd)
 
 //{ SRB2kart p_user.c Stuff
 
+static fixed_t K_GetMobjWeight(mobj_t *mobj, mobj_t *against)
+{
+	fixed_t weight = 5<<FRACBITS;
+
+	switch (mobj->type)
+	{
+		case MT_PLAYER:
+			if (!mobj->player)
+				break;
+			if (against->player && !against->player->kartstuff[k_spinouttimer] && mobj->player->kartstuff[k_spinouttimer])
+				weight = 0; // Do not bump
+			else
+				weight = (mobj->player->kartweight)<<FRACBITS;
+			break;
+		case MT_GREENITEM:
+		case MT_GREENSHIELD:
+			if (against->player)
+				weight = (against->player->kartweight)<<FRACBITS;
+			break;
+		case MT_JAWZ:
+		case MT_JAWZ_DUD:
+		case MT_JAWZ_SHIELD:
+			if (against->player)
+				weight = (against->player->kartweight+3)<<FRACBITS;
+			else
+				weight = 8<<FRACBITS;
+			break;
+		default:
+			break;
+	}
+
+	return weight;
+}
+
 void K_KartBouncing(mobj_t *mobj1, mobj_t *mobj2, boolean bounce, boolean solid)
 {
 	mobj_t *fx;
 	fixed_t momdifx, momdify;
 	fixed_t distx, disty;
+	//fixed_t nobumpx = 0, nobumpy = 0;
 	fixed_t dot, p;
 	fixed_t mass1, mass2;
 
@@ -951,44 +986,24 @@ void K_KartBouncing(mobj_t *mobj1, mobj_t *mobj2, boolean bounce, boolean solid)
 		return;
 
 	// Don't bump if you've recently bumped
-	if ((mobj1->player && mobj1->player->kartstuff[k_justbumped])
-		|| (mobj2->player && mobj1->player->kartstuff[k_justbumped]))
+	if (mobj1->player && mobj1->player->kartstuff[k_justbumped])
 	{
-		if (mobj1->player)
-			mobj1->player->kartstuff[k_justbumped] = bumptime;
-		if (mobj2->player)
-			mobj2->player->kartstuff[k_justbumped] = bumptime;
+		mobj1->player->kartstuff[k_justbumped] = bumptime;
 		return;
 	}
 
-	S_StartSound(mobj1, sfx_s3k49);
-
-	fx = P_SpawnMobj(mobj1->x/2 + mobj2->x/2, mobj1->y/2 + mobj2->y/2, mobj1->z/2 + mobj2->z/2, MT_BUMP);
-	if (mobj1->eflags & MFE_VERTICALFLIP)
-		fx->eflags |= MFE_VERTICALFLIP;
-	else
-		fx->eflags &= ~MFE_VERTICALFLIP;
-	fx->scale = mobj1->scale;
-
-	if (bounce == true) // Perform a Goomba Bounce.
-		mobj1->momz = -mobj1->momz;
-	else
+	if (mobj2->player && mobj2->player->kartstuff[k_justbumped])
 	{
-		fixed_t newz = mobj1->momz;
-		mobj1->momz = mobj2->momz;
-		if (solid == false)
-			mobj2->momz = newz;
+		mobj2->player->kartstuff[k_justbumped] = bumptime;
+		return;
 	}
 
-	mass1 = mass2 = 5*FRACUNIT;
+	mass1 = K_GetMobjWeight(mobj1, mobj2);
 
-	if (mobj1->player)
-		mass1 = (mobj1->player->kartweight)*FRACUNIT;
-
-	if (mobj2->player)
-		mass2 = (mobj2->player->kartweight)*FRACUNIT;
-	else if (solid == true)
+	if (solid == true && mass1 > 0)
 		mass2 = mass1;
+	else
+		mass2 = K_GetMobjWeight(mobj2, mobj1);
 
 	momdifx = mobj1->momx - mobj2->momx;
 	momdify = mobj1->momy - mobj2->momy;
@@ -1003,8 +1018,19 @@ void K_KartBouncing(mobj_t *mobj1, mobj_t *mobj2, boolean bounce, boolean solid)
 		momdify = FixedMul((25*mapheaderinfo[gamemap-1]->mobj_scale), normalisedy);
 	}
 
-	distx = mobj1->x - mobj2->x;
-	disty = mobj1->y - mobj2->y;
+	/*if (mass1 == 0 && mass2 > 0)
+	{
+		nobumpx = mobj2->momx;
+		nobumpy = mobj2->momy;
+	}
+	else if (mass2 == 0 && mass1 > 0)
+	{
+		nobumpx = mobj1->momx;
+		nobumpy = mobj1->momy;
+	}*/
+	
+	distx = (mobj1->x + mobj2->momx) - (mobj2->x + mobj1->momx);
+	disty = (mobj1->y + mobj2->momy) - (mobj2->y + mobj1->momy);
 
 	if (distx == 0 && disty == 0)
 	{
@@ -1022,15 +1048,39 @@ void K_KartBouncing(mobj_t *mobj1, mobj_t *mobj2, boolean bounce, boolean solid)
 
 	p = FixedDiv(dot, FixedMul(distx, distx)+FixedMul(disty, disty));
 
-	mobj1->momx = mobj1->momx - FixedMul(FixedMul(FixedDiv(2*mass2, mass1 + mass2), p), distx);
-	mobj1->momy = mobj1->momy - FixedMul(FixedMul(FixedDiv(2*mass2, mass1 + mass2), p), disty);
+	if (bounce == true && mass2 > 0) // Perform a Goomba Bounce.
+		mobj1->momz = -mobj1->momz;
+	else
+	{
+		fixed_t newz = mobj1->momz;
+		if (mass2 > 0)
+			mobj1->momz = mobj2->momz;
+		if (mass1 > 0 && solid == false)
+			mobj2->momz = newz;
+	}
 
-	if (solid == false)
+	if (mass2 > 0)
+	{
+		mobj1->momx = mobj1->momx - FixedMul(FixedMul(FixedDiv(2*mass2, mass1 + mass2), p), distx);
+		mobj1->momy = mobj1->momy - FixedMul(FixedMul(FixedDiv(2*mass2, mass1 + mass2), p), disty);
+	}
+
+	if (mass1 > 0 && solid == false)
 	{
 		mobj2->momx = mobj2->momx - FixedMul(FixedMul(FixedDiv(2*mass1, mass1 + mass2), p), -distx);
 		mobj2->momy = mobj2->momy - FixedMul(FixedMul(FixedDiv(2*mass1, mass1 + mass2), p), -disty);
 	}
 
+	// Do the bump fx when we've CONFIRMED we can bump.
+	S_StartSound(mobj1, sfx_s3k49);
+
+	fx = P_SpawnMobj(mobj1->x/2 + mobj2->x/2, mobj1->y/2 + mobj2->y/2, mobj1->z/2 + mobj2->z/2, MT_BUMP);
+	if (mobj1->eflags & MFE_VERTICALFLIP)
+		fx->eflags |= MFE_VERTICALFLIP;
+	else
+		fx->eflags &= ~MFE_VERTICALFLIP;
+	fx->scale = mobj1->scale;
+
 	// Because this is done during collision now, rmomx and rmomy need to be recalculated
 	// so that friction doesn't immediately decide to stop the player if they're at a standstill
 	// Also set justbumped here
@@ -1039,6 +1089,11 @@ void K_KartBouncing(mobj_t *mobj1, mobj_t *mobj2, boolean bounce, boolean solid)
 		mobj1->player->rmomx = mobj1->momx - mobj1->player->cmomx;
 		mobj1->player->rmomy = mobj1->momy - mobj1->player->cmomy;
 		mobj1->player->kartstuff[k_justbumped] = bumptime;
+		if (mobj1->player->kartstuff[k_spinouttimer])
+		{
+			mobj1->player->kartstuff[k_wipeoutslow] += wipeoutslowtime+1;
+			mobj1->player->kartstuff[k_spinouttimer] += wipeoutslowtime+1;
+		}
 	}
 
 	if (mobj2->player)
@@ -1046,6 +1101,11 @@ void K_KartBouncing(mobj_t *mobj1, mobj_t *mobj2, boolean bounce, boolean solid)
 		mobj2->player->rmomx = mobj2->momx - mobj2->player->cmomx;
 		mobj2->player->rmomy = mobj2->momy - mobj2->player->cmomy;
 		mobj2->player->kartstuff[k_justbumped] = bumptime;
+		if (mobj2->player->kartstuff[k_spinouttimer])
+		{
+			mobj2->player->kartstuff[k_wipeoutslow] += wipeoutslowtime+1;
+			mobj2->player->kartstuff[k_spinouttimer] += wipeoutslowtime+1;
+		}
 	}
 }
 
@@ -1333,12 +1393,15 @@ static fixed_t K_GetKartBoostPower(player_t *player, boolean speed)
 	fixed_t boostpower = FRACUNIT;
 	fixed_t boostvalue = 0;
 
+	if (player->kartstuff[k_spinouttimer] && player->kartstuff[k_wipeoutslow] == 1) // Slow down after you've been bumped
+		return 0;
+
 	// Offroad is separate, it's difficult to factor it in with a variable value anyway.
 	if (!(player->kartstuff[k_invincibilitytimer] || player->kartstuff[k_hyudorotimer] || player->kartstuff[k_sneakertimer])
 		&& player->kartstuff[k_offroad] >= 0 && speed)
 		boostpower = FixedDiv(boostpower, player->kartstuff[k_offroad] + FRACUNIT);
 
-	if (player->kartstuff[k_bananadrag] > TICRATE) // Avoid making x10 banana a hassle to use
+	if (player->kartstuff[k_bananadrag] > TICRATE)
 		boostpower = 4*boostpower/5;
 
 	if (player->kartstuff[k_growshrinktimer] > 0)
@@ -1556,7 +1619,7 @@ void K_SpinPlayer(player_t *player, mobj_t *source, INT32 type, boolean trapitem
 		S_StartSound(player->mo, sfx_slip);
 	}
 	else
-		player->kartstuff[k_spinouttimer] = 1*TICRATE; // Wipeout
+		player->kartstuff[k_spinouttimer] = TICRATE+20; // Wipeout
 
 	player->powers[pw_flashing] = K_GetKartFlashing();
 
@@ -2079,6 +2142,22 @@ void K_SpawnSparkleTrail(mobj_t *mo)
 	}
 }
 
+void K_SpawnWipeoutTrail(mobj_t *mo)
+{
+	mobj_t *dust;
+
+	I_Assert(mo != NULL);
+	I_Assert(!P_MobjWasRemoved(mo));
+
+	dust = P_SpawnMobj(mo->x + (P_RandomRange(-25,25)<<FRACBITS), mo->y + (P_RandomRange(-25,25)<<FRACBITS), mo->z, MT_WIPEOUTTRAIL);
+
+	P_SetTarget(&dust->target, mo);
+	dust->angle = R_PointToAngle2(0,0,mo->momx,mo->momy);
+	dust->destscale = mo->scale;
+	P_SetScale(dust, mo->scale);
+	dust->eflags = (dust->eflags & ~MFE_VERTICALFLIP)|(mo->eflags & MFE_VERTICALFLIP);
+}
+
 //	K_DriftDustHandling
 //	Parameters:
 //		spawner: The map object that is spawning the drift dust
@@ -2789,17 +2868,27 @@ void K_KartPlayerThink(player_t *player, ticcmd_t *cmd)
 	{
 		if ((P_IsObjectOnGround(player->mo) || player->kartstuff[k_spinouttype] == 1)
 			&& (player->kartstuff[k_sneakertimer] == 0))
+		{
 			player->kartstuff[k_spinouttimer]--;
-		if (player->kartstuff[k_spinouttimer] == 0)
-			player->kartstuff[k_spinouttype] = 0; // Reset type
+			if (player->kartstuff[k_wipeoutslow] > 1)
+				player->kartstuff[k_wipeoutslow]--;
+			if (player->kartstuff[k_spinouttimer] == 0)
+				player->kartstuff[k_spinouttype] = 0; // Reset type
+		}
 	}
-	else if (!comeback)
-		player->kartstuff[k_comebacktimer] = comebacktime;
-	else if (player->kartstuff[k_comebacktimer])
+	else
 	{
-		player->kartstuff[k_comebacktimer]--;
-		if (P_IsLocalPlayer(player) && player->kartstuff[k_bumper] <= 0 && player->kartstuff[k_comebacktimer] <= 0)
-			comebackshowninfo = true; // client has already seen the message
+		if (player->kartstuff[k_wipeoutslow] == 1)
+			player->mo->friction = ORIG_FRICTION;
+		player->kartstuff[k_wipeoutslow] = 0;
+		if (!comeback)
+			player->kartstuff[k_comebacktimer] = comebacktime;
+		else if (player->kartstuff[k_comebacktimer])
+		{
+			player->kartstuff[k_comebacktimer]--;
+			if (P_IsLocalPlayer(player) && player->kartstuff[k_bumper] <= 0 && player->kartstuff[k_comebacktimer] <= 0)
+				comebackshowninfo = true; // client has already seen the message
+		}
 	}
 
 	if (player->kartstuff[k_spinouttimer] == 0 && player->powers[pw_flashing] == K_GetKartFlashing())
@@ -3805,6 +3894,12 @@ void K_MoveKartPlayer(player_t *player, boolean onground)
 		if (player->mo->movefactor < 32)
 			player->mo->movefactor = 32;
 	}
+	if (player->kartstuff[k_spinouttimer] && player->kartstuff[k_wipeoutslow])
+	{
+		player->mo->friction -= FixedMul(1228, player->kartstuff[k_offroad]);
+		if (player->kartstuff[k_wipeoutslow] == 1)
+			player->mo->friction -= 4912;
+	}
 
 	K_KartDrift(player, onground);
 
diff --git a/src/k_kart.h b/src/k_kart.h
index 81173380..4a6a7e1a 100644
--- a/src/k_kart.h
+++ b/src/k_kart.h
@@ -33,6 +33,7 @@ void K_SpawnKartExplosion(fixed_t x, fixed_t y, fixed_t z, fixed_t radius, INT32
 void K_SpawnMineExplosion(mobj_t *source, UINT8 color);
 void K_SpawnBoostTrail(player_t *player);
 void K_SpawnSparkleTrail(mobj_t *mo);
+void K_SpawnWipeoutTrail(mobj_t *mo);
 void K_DriftDustHandling(mobj_t *spawner);
 void K_DoSneaker(player_t *player, boolean doPFlag);
 void K_DoPogoSpring(mobj_t *mo, fixed_t vertispeed, boolean mute);
diff --git a/src/lua_baselib.c b/src/lua_baselib.c
index 7e1b6947..d86315c0 100644
--- a/src/lua_baselib.c
+++ b/src/lua_baselib.c
@@ -2132,6 +2132,16 @@ static int lib_kSpawnSparkleTrail(lua_State *L)
 	return 0;
 }
 
+static int lib_kSpawnWipeoutTrail(lua_State *L)
+{
+	mobj_t *mo = *((mobj_t **)luaL_checkudata(L, 1, META_MOBJ));
+	NOHUD
+	if (!mo)
+		return LUA_ErrInvalid(L, "mobj_t");
+	K_SpawnWipeoutTrail(mo);
+	return 0;
+}
+
 static int lib_kDriftDustHandling(lua_State *L)
 {
 	mobj_t *spawner = *((mobj_t **)luaL_checkudata(L, 1, META_MOBJ));
@@ -2418,6 +2428,7 @@ static luaL_Reg lib[] = {
 	{"K_SpawnKartExplosion",lib_kSpawnKartExplosion},
 	{"K_SpawnBoostTrail",lib_kSpawnBoostTrail},
 	{"K_SpawnSparkleTrail",lib_kSpawnSparkleTrail},
+	{"K_SpawnWipeoutTrail",lib_kSpawnWipeoutTrail},
 	{"K_DriftDustHandling",lib_kDriftDustHandling},
 	{"K_DoSneaker",lib_kDoSneaker},
 	{"K_DoPogoSpring",lib_kDoPogoSpring},
diff --git a/src/p_inter.c b/src/p_inter.c
index d46ab29f..4c5e65ff 100644
--- a/src/p_inter.c
+++ b/src/p_inter.c
@@ -3325,7 +3325,8 @@ boolean P_DamageMobj(mobj_t *target, mobj_t *inflictor, mobj_t *source, INT32 da
 				damage = player->mo->health - 1;
 				P_RingDamage(player, inflictor, source, damage);
 				P_PlayerRingBurst(player, 5);
-				player->mo->momx = player->mo->momy = 0;
+				if (inflictor->type == MT_FAKEITEM || inflictor->type == MT_FAKESHIELD)
+					player->mo->momx = player->mo->momy = 0;
 				if (P_IsLocalPlayer(player))
 				{
 					quake.intensity = 32*FRACUNIT;
diff --git a/src/p_map.c b/src/p_map.c
index fee4c388..33498bff 100644
--- a/src/p_map.c
+++ b/src/p_map.c
@@ -694,6 +694,7 @@ static boolean PIT_CheckThing(mobj_t *thing)
 		{
 			// Player Damage
 			P_DamageMobj(thing, tmthing, tmthing->target, 1);
+			K_KartBouncing(thing, tmthing, false, false);
 
 			if (tmthing->type == MT_GREENITEM || tmthing->type == MT_JAWZ || tmthing->type == MT_JAWZ_DUD)
 				S_StartSound(thing, sfx_shelit);
@@ -1126,6 +1127,9 @@ static boolean PIT_CheckThing(mobj_t *thing)
 			// Player Damage
 			P_DamageMobj(tmthing, thing, thing->target, 1);
 
+			if (thing->type != MT_FAKESHIELD && thing->type != MT_FAKEITEM)
+				K_KartBouncing(tmthing, thing, false, false);
+
 			if (thing->type == MT_GREENITEM || thing->type == MT_JAWZ || thing->type == MT_JAWZ_DUD)
 				S_StartSound(tmthing, sfx_shelit);
 
@@ -1629,18 +1633,23 @@ static boolean PIT_CheckThing(mobj_t *thing)
 		}
 		else if (thing->player) // bounce when players collide
 		{
+			const boolean tvulnerable = (!(thing->player->powers[pw_flashing]
+				|| thing->player->kartstuff[k_invincibilitytimer]
+				|| thing->player->kartstuff[k_spinouttimer]));
+			const boolean tmtvulnerable = (!(tmthing->player->powers[pw_flashing]
+				|| tmthing->player->kartstuff[k_invincibilitytimer]
+				|| tmthing->player->kartstuff[k_spinouttimer]));
+
 			// see if it went over / under
 			if (tmthing->z > thing->z + thing->height)
 				return true; // overhead
 			if (tmthing->z + tmthing->height < thing->z)
 				return true; // underneath
 
-			if (thing->player->kartstuff[k_spinouttimer] || thing->player->kartstuff[k_squishedtimer]
-				|| thing->player->kartstuff[k_hyudorotimer] || thing->player->kartstuff[k_invincibilitytimer] 
+			if (thing->player->kartstuff[k_squishedtimer] || thing->player->kartstuff[k_hyudorotimer]
 				|| thing->player->kartstuff[k_justbumped] || thing->scale > tmthing->scale + (FRACUNIT/8)
 				|| (G_BattleGametype() && thing->player->kartstuff[k_bumper] <= 0)
-				|| tmthing->player->kartstuff[k_spinouttimer] || tmthing->player->kartstuff[k_squishedtimer]
-				|| tmthing->player->kartstuff[k_hyudorotimer] || tmthing->player->kartstuff[k_invincibilitytimer]
+				|| tmthing->player->kartstuff[k_squishedtimer] || tmthing->player->kartstuff[k_hyudorotimer]
 				|| tmthing->player->kartstuff[k_justbumped] || tmthing->scale > thing->scale + (FRACUNIT/8)
 				|| (G_BattleGametype() && tmthing->player->kartstuff[k_bumper] <= 0))
 			{
@@ -1650,7 +1659,7 @@ static boolean PIT_CheckThing(mobj_t *thing)
 			if (P_IsObjectOnGround(thing) && tmthing->momz < 0)
 			{
 				K_KartBouncing(tmthing, thing, true, false);
-				if (G_BattleGametype() && tmthing->player->kartstuff[k_pogospring])
+				if (G_BattleGametype() && tmthing->player->kartstuff[k_pogospring] && tvulnerable)
 				{
 					K_StealBumper(tmthing->player, thing->player, false);
 					K_SpinPlayer(thing->player, tmthing, 0, false);
@@ -1659,7 +1668,7 @@ static boolean PIT_CheckThing(mobj_t *thing)
 			else if (P_IsObjectOnGround(tmthing) && thing->momz < 0)
 			{
 				K_KartBouncing(thing, tmthing, true, false);
-				if (G_BattleGametype() && thing->player->kartstuff[k_pogospring])
+				if (G_BattleGametype() && thing->player->kartstuff[k_pogospring] && tmtvulnerable)
 				{
 					K_StealBumper(thing->player, tmthing->player, false);
 					K_SpinPlayer(tmthing->player, thing, 0, false);
@@ -1670,12 +1679,12 @@ static boolean PIT_CheckThing(mobj_t *thing)
 
 			if (G_BattleGametype())
 			{
-				if (thing->player->kartstuff[k_sneakertimer] && !(tmthing->player->kartstuff[k_sneakertimer]))
+				if (thing->player->kartstuff[k_sneakertimer] && !(tmthing->player->kartstuff[k_sneakertimer]) && tmtvulnerable)
 				{
 					K_StealBumper(thing->player, tmthing->player, false);
 					K_SpinPlayer(tmthing->player, thing, 0, false);
 				}
-				else if (tmthing->player->kartstuff[k_sneakertimer] && !(thing->player->kartstuff[k_sneakertimer]))
+				else if (tmthing->player->kartstuff[k_sneakertimer] && !(thing->player->kartstuff[k_sneakertimer]) && tvulnerable)
 				{
 					K_StealBumper(tmthing->player, thing->player, false);
 					K_SpinPlayer(thing->player, tmthing, 0, false);
diff --git a/src/p_mobj.c b/src/p_mobj.c
index 4c0227a7..d74ce852 100644
--- a/src/p_mobj.c
+++ b/src/p_mobj.c
@@ -2003,7 +2003,7 @@ void P_XYMovement(mobj_t *mo)
 	if (mo->type == MT_GREENITEM || mo->type == MT_JAWZ_DUD || mo->type == MT_JAWZ || mo->type == MT_BALLHOG) //(mo->type == MT_JAWZ && !mo->tracer))
 		return;
 
-	if (mo->player && mo->player->kartstuff[k_spinouttimer] && mo->player->speed <= mo->player->normalspeed/2)
+	if (mo->player && (mo->player->kartstuff[k_spinouttimer] && !mo->player->kartstuff[k_wipeoutslow]) && mo->player->speed <= mo->player->normalspeed/2)
 		return;
 	//}
 
@@ -2889,16 +2889,16 @@ static void P_PlayerZMovement(mobj_t *mo)
 					// Cut momentum in half when you hit the ground and
 					// aren't pressing any controls.
 					if (!(mo->player->cmd.forwardmove || mo->player->cmd.sidemove) && !mo->player->cmomx && !mo->player->cmomy
-						&& !(mo->player->pflags & PF_SPINNING) && !(mo->player->kartstuff[k_spinouttimer]))
+						&& !(mo->player->kartstuff[k_spinouttimer]))
 					{
 						mo->momx = mo->momx/2;
 						mo->momy = mo->momy/2;
-					}
 
-					if (mo->player->cmd.buttons & BT_BRAKE && !(mo->player->cmd.forwardmove)) // FURTHER slowdown if you're braking.
-					{
-						mo->momx = mo->momx/2;
-						mo->momy = mo->momy/2;
+						if (mo->player->cmd.buttons & BT_BRAKE && !(mo->player->cmd.forwardmove)) // FURTHER slowdown if you're braking.
+						{
+							mo->momx = mo->momx/2;
+							mo->momy = mo->momy/2;
+						}
 					}
 				}
 
diff --git a/src/p_user.c b/src/p_user.c
index ee477a7d..2f083496 100644
--- a/src/p_user.c
+++ b/src/p_user.c
@@ -852,15 +852,19 @@ void P_DoPlayerPain(player_t *player, mobj_t *source, mobj_t *inflictor)
 	angle_t ang;
 	fixed_t fallbackspeed;
 
-	if (player->mo->eflags & MFE_VERTICALFLIP)
-		player->mo->z--;
-	else
-		player->mo->z++;
+	if (inflictor && (inflictor->type != MT_PLAYER && inflictor->type != MT_GREENITEM && inflictor->type != MT_GREENSHIELD
+		&& inflictor->type != MT_JAWZ && inflictor->type != MT_JAWZ_DUD && inflictor->type != MT_JAWZ_SHIELD))
+	{
+		if (player->mo->eflags & MFE_VERTICALFLIP)
+			player->mo->z--;
+		else
+			player->mo->z++;
 
-	if (player->mo->eflags & MFE_UNDERWATER)
-		P_SetObjectMomZ(player->mo, FixedDiv(10511*FRACUNIT,2600*FRACUNIT), false);
-	else
-		P_SetObjectMomZ(player->mo, FixedDiv(69*FRACUNIT,10*FRACUNIT), false);
+		if (player->mo->eflags & MFE_UNDERWATER)
+			P_SetObjectMomZ(player->mo, FixedDiv(10511*FRACUNIT,2600*FRACUNIT), false);
+		else
+			P_SetObjectMomZ(player->mo, FixedDiv(69*FRACUNIT,10*FRACUNIT), false);
+	}
 
 	if (inflictor)
 	{
@@ -6933,6 +6937,9 @@ static void P_MovePlayer(player_t *player)
 	if (player->kartstuff[k_invincibilitytimer] > 0)
 		K_SpawnSparkleTrail(player->mo);
 
+	if (player->kartstuff[k_wipeoutslow] > 1 && (leveltime & 1))
+		K_SpawnWipeoutTrail(player->mo);
+
 	K_DriftDustHandling(player->mo);
 
 	/* // SRB2kart - nadah