diff --git a/src/k_collide.c b/src/k_collide.c
index 95fe28983..e0b3b2253 100644
--- a/src/k_collide.c
+++ b/src/k_collide.c
@@ -852,7 +852,7 @@ boolean K_SMKIceBlockCollide(mobj_t *t1, mobj_t *t2)
 
 	/*
 	if (t2->player && (t2->player->invincibilitytimer > 0
-		|| t2->player->growshrinktimer > 0))
+		|| K_IsBigger(t2, t1) == true))
 		return true;
 	*/
 
@@ -936,8 +936,8 @@ boolean K_PvPTouchDamage(mobj_t *t1, mobj_t *t2)
 	}
 
 	// Cause stumble on scale difference
-	t1Condition = (t1->scale > t2->scale + (mapobjectscale/8));
-	t2Condition = (t2->scale > t1->scale + (mapobjectscale/8));
+	t1Condition = K_IsBigger(t1, t2);
+	t2Condition = K_IsBigger(t2, t1);
 
 	if (t1Condition == true && t2Condition == false)
 	{
diff --git a/src/k_kart.c b/src/k_kart.c
index aa4187aa1..63029dbc2 100644
--- a/src/k_kart.c
+++ b/src/k_kart.c
@@ -1409,7 +1409,7 @@ fixed_t K_GetMobjWeight(mobj_t *mobj, mobj_t *against)
 		case MT_FALLINGROCK:
 			if (against->player)
 			{
-				if (against->player->invincibilitytimer || against->player->growshrinktimer > 0)
+				if (against->player->invincibilitytimer || K_IsBigger(against, mobj) == true)
 					weight = 0;
 				else
 					weight = K_PlayerWeight(against, NULL);
@@ -3935,6 +3935,17 @@ void K_RemoveGrowShrink(player_t *player)
 	P_RestoreMusic(player);
 }
 
+boolean K_IsBigger(mobj_t *compare, mobj_t *other)
+{
+	if ((compare == NULL || P_MobjWasRemoved(compare) == true)
+		|| (other == NULL || P_MobjWasRemoved(other) == true))
+	{
+		return false;
+	}
+
+	return (compare->scale > other->scale + (mapobjectscale/2));
+}
+
 static fixed_t K_TumbleZ(mobj_t *mo, fixed_t input)
 {
 	// Scales base tumble gravity to FRACUNIT
diff --git a/src/p_inter.c b/src/p_inter.c
index b11c269e0..4974338bb 100644
--- a/src/p_inter.c
+++ b/src/p_inter.c
@@ -387,7 +387,7 @@ void P_TouchSpecialThing(mobj_t *special, mobj_t *toucher, boolean heightcheck)
 
 			// kill
 			if (player->invincibilitytimer > 0
-				|| player->growshrinktimer > 0
+				|| K_IsBigger(toucher, special) == true
 				|| player->flamedash > 0)
 			{
 				P_KillMobj(special, toucher, toucher, DMG_NORMAL);
@@ -1926,7 +1926,7 @@ boolean P_DamageMobj(mobj_t *target, mobj_t *inflictor, mobj_t *source, INT32 da
 					}
 				}
 
-				if (player->invincibilitytimer > 0 || player->growshrinktimer > 0 || player->hyudorotimer > 0)
+				if (player->invincibilitytimer > 0 || K_IsBigger(target, inflictor) == true || player->hyudorotimer > 0)
 				{
 					// Full invulnerability
 					K_DoInstashield(player);
diff --git a/src/p_map.c b/src/p_map.c
index 5b1827988..619f8698a 100644
--- a/src/p_map.c
+++ b/src/p_map.c
@@ -1368,7 +1368,7 @@ static BlockItReturn_t PIT_CheckThing(mobj_t *thing)
 				return BMIT_CONTINUE; // dead
 
 			if (tmthing->player->invincibilitytimer > 0
-				|| tmthing->player->growshrinktimer > 0)
+				|| K_IsBigger(tmthing, thing) == true)
 			{
 				if (thing->type == MT_BLUEROBRA_JOINT)
 					P_KillMobj(thing->target, tmthing, tmthing, DMG_NORMAL);
@@ -1394,7 +1394,7 @@ static BlockItReturn_t PIT_CheckThing(mobj_t *thing)
 				return BMIT_CONTINUE; // dead
 
 			if (tmthing->player->invincibilitytimer > 0
-				|| tmthing->player->growshrinktimer > 0)
+				|| K_IsBigger(tmthing, thing) == true)
 			{
 				P_KillMobj(thing, tmthing, tmthing, DMG_NORMAL);
 				return BMIT_CONTINUE; // kill
@@ -1425,7 +1425,7 @@ static BlockItReturn_t PIT_CheckThing(mobj_t *thing)
 
 			// kill
 			if (tmthing->player->invincibilitytimer > 0
-				|| tmthing->player->growshrinktimer > 0)
+				|| K_IsBigger(tmthing, thing) == true)
 			{
 				P_KillMobj(thing, tmthing, tmthing, DMG_NORMAL);
 				return BMIT_CONTINUE;