diff --git a/src/p_actionfunctions.cpp b/src/p_actionfunctions.cpp
index f1b4fee802..6ddfd52819 100644
--- a/src/p_actionfunctions.cpp
+++ b/src/p_actionfunctions.cpp
@@ -1524,7 +1524,7 @@ DEFINE_ACTION_FUNCTION(AActor, A_CustomMissile)
 						Pitch += missile->Vel.Pitch();
 					}
 					missilespeed = fabs(Pitch.Cos() * missile->Speed);
-					missile->Vel.Z = -Pitch.Sin() * missile->Speed;
+					missile->Vel.Z = Pitch.Sin() * missile->Speed;
 				}
 				else
 				{
diff --git a/src/p_enemy.cpp b/src/p_enemy.cpp
index 4b99a5f527..326c0dca4c 100644
--- a/src/p_enemy.cpp
+++ b/src/p_enemy.cpp
@@ -262,7 +262,7 @@ void P_NoiseAlert (AActor *target, AActor *emitter, bool splash, double maxdist)
 	}
 }
 
-DEFINE_ACTION_FUNCTION(AActor, NoiseAlert)
+DEFINE_ACTION_FUNCTION(AActor, SoundAlert)
 {
 	PARAM_SELF_PROLOGUE(AActor);
 	PARAM_OBJECT(target, AActor);
diff --git a/src/r_things.cpp b/src/r_things.cpp
index 0a9d74c204..6e1261c1bb 100644
--- a/src/r_things.cpp
+++ b/src/r_things.cpp
@@ -1771,7 +1771,7 @@ void R_DrawPlayerSprites ()
 			else
 			{
 				wx = weapon->oldx + (weapon->x - weapon->oldx) * r_TicFracF;
-				wy = weapon->oldy + (weapon->y - weapon->oldy) * r_TicFracF + WEAPON_FUDGE_Y;
+				wy = weapon->oldy + (weapon->y - weapon->oldy) * r_TicFracF;
 			}
 		}
 		else
diff --git a/src/scripting/codegeneration/codegen.cpp b/src/scripting/codegeneration/codegen.cpp
index 16025c0d0f..90fbcfe683 100644
--- a/src/scripting/codegeneration/codegen.cpp
+++ b/src/scripting/codegeneration/codegen.cpp
@@ -3371,6 +3371,17 @@ FxExpression *FxCompareEq::Resolve(FCompileContext& ctx)
 		{
 			Promote(ctx);
 		}
+		// allows comparing state labels with null pointers.
+		else if (left->ValueType == TypeStateLabel && right->ValueType == TypeNullPtr)
+		{
+			right = new FxTypeCast(right, TypeStateLabel, false);
+			SAFE_RESOLVE(right, ctx);
+		}
+		else if (right->ValueType == TypeStateLabel && left->ValueType == TypeNullPtr)
+		{
+			left = new FxTypeCast(left, TypeStateLabel, false);
+			SAFE_RESOLVE(left, ctx);
+		}
 		else if (left->ValueType->GetRegType() == REGT_POINTER && right->ValueType->GetRegType() == REGT_POINTER)
 		{
 			if (left->ValueType != right->ValueType && right->ValueType != TypeNullPtr && left->ValueType != TypeNullPtr &&
@@ -7072,7 +7083,7 @@ FxExpression *FxFunctionCall::Resolve(FCompileContext& ctx)
 			delete this;
 			return nullptr;
 		}
-		FxExpression *self = (ctx.Function && ctx.Function->Variants[0].Flags & VARF_Method) ? new FxSelf(ScriptPosition) : nullptr;
+		FxExpression *self = (ctx.Function && (ctx.Function->Variants[0].Flags & VARF_Method) && ctx.Class->IsKindOf(RUNTIME_CLASS(PClassActor))) ? new FxSelf(ScriptPosition) : (FxExpression*)new FxConstant(ScriptPosition);
 		FxExpression *x = new FxActionSpecialCall(self, special, ArgList, ScriptPosition);
 		delete this;
 		return x->Resolve(ctx);
@@ -7644,9 +7655,9 @@ ExpEmit FxActionSpecialCall::Emit(VMFunctionBuilder *build)
 	unsigned i = 0;
 
 	build->Emit(OP_PARAMI, abs(Special));			// pass special number
-	// fixme: This really should use the Self pointer that got passed to this class instead of just using the first argument from the function. 
-	// Once static functions are possible, or specials can be called through a member access operator this won't work anymore.
-	build->Emit(OP_PARAM, 0, REGT_POINTER, 0);		// pass self 
+
+	ExpEmit selfemit(Self->Emit(build));
+	build->Emit(OP_PARAM, 0, selfemit.Konst ? REGT_POINTER | REGT_KONST : REGT_POINTER, selfemit.RegNum);			// pass special number
 	for (; i < ArgList.Size(); ++i)
 	{
 		FxExpression *argex = ArgList[i];
diff --git a/wadsrc/static/zscript/actor.txt b/wadsrc/static/zscript/actor.txt
index 1e5c394160..d804a434c6 100644
--- a/wadsrc/static/zscript/actor.txt
+++ b/wadsrc/static/zscript/actor.txt
@@ -300,7 +300,7 @@ class Actor : Thinker native
 	native bool isTeammate(Actor other);
 	native int PlayerNumber();
 	native void SetFriendPlayer(PlayerInfo player);
-	native void NoiseAlert(Actor target, bool splash = false, double maxdist = 0);
+	native void SoundAlert(Actor target, bool splash = false, double maxdist = 0);
 	native void DaggerAlert(Actor target);
 	native void ClearBounce();
 	native TerrainDef GetFloorTerrain();
diff --git a/wadsrc/static/zscript/doom/scriptedmarine.txt b/wadsrc/static/zscript/doom/scriptedmarine.txt
index 9ecfbc4605..7428b7be35 100644
--- a/wadsrc/static/zscript/doom/scriptedmarine.txt
+++ b/wadsrc/static/zscript/doom/scriptedmarine.txt
@@ -282,7 +282,7 @@ class ScriptedMarine : Actor
 	//
 	//============================================================================
 
-	void A_M_Refire (bool ignoremissile, statelabel jumpto)
+	void A_M_Refire (bool ignoremissile, statelabel jumpto = null)
 	{
 		if (target == null || target.health <= 0)
 		{
@@ -293,13 +293,15 @@ class ScriptedMarine : Actor
 					return;
 				}
 			}
-			SetStateLabel (jumpto);
+			if (jumpto != null) SetStateLabel (jumpto);
+			else SetState(CurState + 1);
 			return;
 		}
 		if (((ignoremissile || MissileState == null) && !CheckMeleeRange ()) ||
 			!CheckSight (target) ||	random[SMarineRefire]() < 4)	// Small chance of stopping even when target not dead
 		{
-			SetStateLabel (jumpto);
+			if (jumpto != null) SetStateLabel (jumpto);
+			else SetState(CurState + 1);
 		}
 	}
 
diff --git a/wadsrc/static/zscript/hexen/blastradius.txt b/wadsrc/static/zscript/hexen/blastradius.txt
index a9c631318a..7374a4523d 100644
--- a/wadsrc/static/zscript/hexen/blastradius.txt
+++ b/wadsrc/static/zscript/hexen/blastradius.txt
@@ -103,10 +103,9 @@ extend class Actor
 	action void A_Blast(int blastflags = 0, double strength = 255, double radius = 255, double speed = 20, class<Actor> blasteffect = "BlastEffect", sound blastsound = "BlastRadius")
 	{
 
-		Weapon weapon = player.ReadyWeapon;
-		if (player && (blastflags & BF_USEAMMO) && invoker == weapon && stateinfo != null && stateinfo.mStateType == STATE_Psprite)
-
+		if (player && (blastflags & BF_USEAMMO) && invoker == player.ReadyWeapon && stateinfo != null && stateinfo.mStateType == STATE_Psprite)
 		{
+			Weapon weapon = player.ReadyWeapon;
 			if (weapon != null && !weapon.DepleteAmmo(weapon.bAltFire))
 			{
 				return;
@@ -117,7 +116,7 @@ extend class Actor
 
 		if (!(blastflags & BF_DONTWARN))
 		{
-			NoiseAlert (self);
+			SoundAlert (self);
 		}
 		ThinkerIterator it = ThinkerIterator.Create("Actor");
 		Actor mo;
diff --git a/wadsrc/static/zscript/strife/acolyte.txt b/wadsrc/static/zscript/strife/acolyte.txt
index e5a019ea8c..c14cb5bf7e 100644
--- a/wadsrc/static/zscript/strife/acolyte.txt
+++ b/wadsrc/static/zscript/strife/acolyte.txt
@@ -302,7 +302,7 @@ class AcolyteToBe : Acolyte
 		Door_Close(999, 64);
 		if (target != null && target.player != null)
 		{
-			NoiseAlert (target);
+			SoundAlert (target);
 		}
 	}
 }
diff --git a/wadsrc/static/zscript/strife/klaxon.txt b/wadsrc/static/zscript/strife/klaxon.txt
index 51c4d7df2d..3384ee0b5e 100644
--- a/wadsrc/static/zscript/strife/klaxon.txt
+++ b/wadsrc/static/zscript/strife/klaxon.txt
@@ -114,7 +114,7 @@ extend class Actor
 		if (reactiontime == 2)
 		{
 			// [RH] Unalert monsters near the alarm and not just those in the same sector as it.
-			NoiseAlert (NULL, false);
+			SoundAlert (NULL, false);
 		}
 		else if (reactiontime > 50)
 		{
diff --git a/wadsrc/static/zscript/strife/stalker.txt b/wadsrc/static/zscript/strife/stalker.txt
index cede9cae12..a9cc4dbaf0 100644
--- a/wadsrc/static/zscript/strife/stalker.txt
+++ b/wadsrc/static/zscript/strife/stalker.txt
@@ -67,7 +67,7 @@ class Stalker : Actor
 		STLK QRST 4;
 		STLK U 4 A_NoBlocking;
 		STLK VW 4;
-		STLK "XYZ[" 4 Bright;
+		STLK XYZ[ 4 Bright;
 		Stop;
 	}
 		
@@ -86,7 +86,7 @@ class Stalker : Actor
 	void A_StalkerLookInit ()
 	{
 		State st;
-		if (!bNoGravity)
+		if (bNoGravity)
 		{
 			st = FindState("LookCeiling");
 		}
@@ -94,7 +94,7 @@ class Stalker : Actor
 		{
 			st = FindState("LookFloor");
 		}
-		if (st.NextState != st)
+		if (st != CurState.NextState)
 		{
 			SetState (st);
 		}
diff --git a/wadsrc/static/zscript/strife/strifefunctions.txt b/wadsrc/static/zscript/strife/strifefunctions.txt
index 7cfdf39746..3a0dec22f4 100644
--- a/wadsrc/static/zscript/strife/strifefunctions.txt
+++ b/wadsrc/static/zscript/strife/strifefunctions.txt
@@ -173,7 +173,7 @@ extend class Actor
 
 		if (target != null && emitter != null)
 		{
-			emitter.NoiseAlert(target, false, maxdist);
+			emitter.SoundAlert(target, false, maxdist);
 		}
 	}
 
diff --git a/wadsrc/static/zscript/strife/strifeitems.txt b/wadsrc/static/zscript/strife/strifeitems.txt
index 6d80377714..4368564cd1 100644
--- a/wadsrc/static/zscript/strife/strifeitems.txt
+++ b/wadsrc/static/zscript/strife/strifeitems.txt
@@ -610,7 +610,7 @@ class RaiseAlarm : DummyStrifeItem
 	
 	override bool TryPickup (in out Actor toucher)
 	{
-		toucher.NoiseAlert (toucher);
+		toucher.SoundAlert (toucher);
 
 		ThinkerIterator it = ThinkerIterator.Create("AlienSpectre3");
 		Actor spectre = Actor(it.Next());
@@ -629,7 +629,7 @@ class RaiseAlarm : DummyStrifeItem
 	{
 		if (dropper.target != null)
 		{
-			dropper.target.NoiseAlert(dropper.target);
+			dropper.target.SoundAlert(dropper.target);
 			if (dropper.target.CheckLocalView(consoleplayer))
 			{
 				A_Log("You Fool!  You've set off the alarm.");
@@ -674,7 +674,7 @@ class CloseDoor222 : DummyStrifeItem
 			{
 				A_Log("You're dead!  You set off the alarm.");
 			}
-			dropper.target.NoiseAlert(dropper.target);
+			dropper.target.SoundAlert(dropper.target);
 		}
 		Destroy ();
 		return true;
diff --git a/wadsrc/static/zscript/strife/strifestuff.txt b/wadsrc/static/zscript/strife/strifestuff.txt
index 37918aa964..f08eaa6a55 100644
--- a/wadsrc/static/zscript/strife/strifestuff.txt
+++ b/wadsrc/static/zscript/strife/strifestuff.txt
@@ -1857,7 +1857,7 @@ class PowerCoupling : Actor
 		// [RH] In case the player broke it with the dagger, alert the guards now.
 		if (LastHeard != source)
 		{
-			NoiseAlert (source);
+			SoundAlert (source);
 		}
 		Door_Close(225, 16);
 		Floor_LowerToHighestEE(44, 8);