diff --git a/src/p_floor.c b/src/p_floor.c
index 19b7611b8..40bd6a6b2 100644
--- a/src/p_floor.c
+++ b/src/p_floor.c
@@ -2425,7 +2425,7 @@ void T_RaiseSector(levelspecthink_t *raise)
 	mobj_t *thing;
 	sector_t *sector;
 	INT32 i;
-	boolean playeronme = false;
+	boolean playeronme = false, active = false;
 	fixed_t ceilingdestination, floordestination;
 	result_e res = 0;
 
@@ -2459,8 +2459,49 @@ void T_RaiseSector(levelspecthink_t *raise)
 			break;
 		}
 	}
+	
+	if (raise->vars[9]) // Dynamically Sinking Platform^tm
+	{
+		tic_t shaketime = 10;
+		if (raise->vars[11] > shaketime) // State: moving
+		{
+			if (playeronme) // If player is standing on the platform, accelerate
+			{
+				raise->vars[10] += (FRACUNIT >> 5);
+			}
+			else // otherwise, decelerate until inflection
+			{
+				raise->vars[10] -= FRACUNIT >> 3;
+				if (raise->vars[10] <= 0) // inflection!
+				{
+					raise->vars[10] = 0;
+					raise->vars[11] = 0; // allow the shake to occur again (fucks over players attempting to jump-cheese)
+				}
+			}
+			active = raise->vars[10] > 0;
+		}
+		else // State: shaking
+		{
+			if (playeronme || raise->vars[11])
+			{
+				active = true;
+				raise->vars[11]++;
+				if (raise->vars[11] > shaketime)
+				{
+					if (playeronme)
+						raise->vars[10] = FRACUNIT >> 5;
+					else
+						raise->vars[10] = FRACUNIT << 1;
+				}
+				else
+					raise->vars[10] = 2*(shaketime/2 - raise->vars[11]) << FRACBITS;
+			}
+		}
+	}
+	else // Air bobbing platform (not a Dynamically Sinking Platform^tm)
+		active = playeronme;
 
-	if (playeronme)
+	if (active)
 	{
 		raise->vars[3] = raise->vars[2];
 
@@ -2553,6 +2594,8 @@ void T_RaiseSector(levelspecthink_t *raise)
 		else if (raise->vars[3] > origspeed)
 			raise->vars[3] = origspeed;
 	}
+	
+	raise->vars[3] += raise->vars[10];
 
 	res = T_MovePlane
 	(
diff --git a/src/p_spec.c b/src/p_spec.c
index 256ca3453..26c4250d5 100644
--- a/src/p_spec.c
+++ b/src/p_spec.c
@@ -6132,7 +6132,7 @@ static void P_AddRaiseThinker(sector_t *sec, line_t *sourceline)
 }
 
 // Function to maintain backwards compatibility
-static void P_AddOldAirbob(sector_t *sec, line_t *sourceline, boolean noadjust)
+static void P_AddOldAirbob(sector_t *sec, line_t *sourceline, boolean noadjust, boolean dynamic)
 {
 	levelspecthink_t *airbob;
 
@@ -6169,6 +6169,8 @@ static void P_AddOldAirbob(sector_t *sec, line_t *sourceline, boolean noadjust)
 	airbob->vars[5] = sec->ceilingheight;
 	airbob->vars[4] = airbob->vars[5]
 			- (sec->ceilingheight - sec->floorheight);
+	
+	airbob->vars[9] = dynamic ? 1 : 0;
 
 	airbob->sourceline = sourceline;
 }
@@ -6987,11 +6989,16 @@ void P_SpawnSpecials(INT32 fromnetsave)
 			case 151: // Adjustable air bobbing platform
 				P_AddFakeFloorsByLine(i, FF_EXISTS|FF_SOLID|FF_RENDERALL|FF_CUTLEVEL, secthinkers);
 				lines[i].flags |= ML_BLOCKMONSTERS;
-				P_AddOldAirbob(lines[i].frontsector, lines + i, (lines[i].special != 151));
+				P_AddOldAirbob(lines[i].frontsector, lines + i, (lines[i].special != 151), false);
 				break;
 			case 152: // Adjustable air bobbing platform in reverse
 				P_AddFakeFloorsByLine(i, FF_EXISTS|FF_SOLID|FF_RENDERALL|FF_CUTLEVEL, secthinkers);
-				P_AddOldAirbob(lines[i].frontsector, lines + i, true);
+				P_AddOldAirbob(lines[i].frontsector, lines + i, true, false);
+				break;
+			case 153: // Dynamic Sinking Platform
+				P_AddFakeFloorsByLine(i, FF_EXISTS|FF_SOLID|FF_RENDERALL|FF_CUTLEVEL, secthinkers);
+				lines[i].flags |= ML_BLOCKMONSTERS;
+				P_AddOldAirbob(lines[i].frontsector, lines + i, false, true);
 				break;
 
 			case 160: // Float/bob platform
@@ -7042,14 +7049,14 @@ void P_SpawnSpecials(INT32 fromnetsave)
 			case 176: // Air bobbing platform that will crumble and bob on the water when it falls and hits
 				P_AddFakeFloorsByLine(i, FF_EXISTS|FF_SOLID|FF_RENDERALL|FF_FLOATBOB|FF_CRUMBLE, secthinkers);
 				lines[i].flags |= ML_BLOCKMONSTERS;
-				P_AddOldAirbob(lines[i].frontsector, lines + i, true);
+				P_AddOldAirbob(lines[i].frontsector, lines + i, true, false);
 				break;
 
 			case 177: // Air bobbing platform that will crumble and bob on
 				// the water when it falls and hits, then never return
 				P_AddFakeFloorsByLine(i, FF_EXISTS|FF_SOLID|FF_RENDERALL|FF_CUTLEVEL|FF_FLOATBOB|FF_CRUMBLE|FF_NORETURN, secthinkers);
 				lines[i].flags |= ML_BLOCKMONSTERS;
-				P_AddOldAirbob(lines[i].frontsector, lines + i, true);
+				P_AddOldAirbob(lines[i].frontsector, lines + i, true, false);
 				break;
 
 			case 178: // Crumbling platform that will float when it hits water
@@ -7063,7 +7070,7 @@ void P_SpawnSpecials(INT32 fromnetsave)
 			case 180: // Air bobbing platform that will crumble
 				P_AddFakeFloorsByLine(i, FF_EXISTS|FF_SOLID|FF_RENDERALL|FF_CUTLEVEL|FF_CRUMBLE, secthinkers);
 				lines[i].flags |= ML_BLOCKMONSTERS;
-				P_AddOldAirbob(lines[i].frontsector, lines + i, true);
+				P_AddOldAirbob(lines[i].frontsector, lines + i, true, false);
 				break;
 
 			case 190: // Rising Platform FOF (solid, opaque, shadows)