diff --git a/language.version b/language.version
index 01a9a0f59..e7d5678a4 100644
--- a/language.version
+++ b/language.version
@@ -1,2 +1,2 @@
 [default]
-SWWM_MODVER="\chSWWM \cwGZ\c- r439 (Thu 30 Jul 14:13:36 CEST 2020)";
+SWWM_MODVER="\chSWWM \cwGZ\c- r440 (Thu 30 Jul 16:31:15 CEST 2020)";
diff --git a/zscript/swwm_thiccboolet.zsc b/zscript/swwm_thiccboolet.zsc
index 5706289b1..de5d10719 100644
--- a/zscript/swwm_thiccboolet.zsc
+++ b/zscript/swwm_thiccboolet.zsc
@@ -128,6 +128,8 @@ Class SilverImpact : Actor
 Class WallPenetrate
 {
 	Vector3 hitpos, hitdir, hitnormal;
+	Line hitline;
+	int hitside;
 }
 
 Class AuxiliarySilverBulletTracer : LineTracer
@@ -203,19 +205,21 @@ Class SilverBulletTracer : SpreadSlugTracer
 					{
 						penetration = max(0,penetration-i*4);
 						let wp = new("WallPenetrate");
+						wp.hitline = Results.HitLine;
+						wp.hitside = Results.Side;
 						wp.hitpos = Results.HitPos;
 						wp.hitdir = Results.HitVector;
 						wp.hitnormal = (-Results.HitLine.delta.y,Results.HitLine.delta.x,0).unit();
 						if ( !Results.Side ) wp.hitnormal *= -1;
 						WallPenetrateList.Push(wp);
-						if ( Results.HitLine.sidedef[1] )
-							ShootThroughList.Push(Results.HitLine);
 						// trace backwards to find exit surface
 						let at = new("AuxiliarySilverBulletTracer");
 						at.Trace(ofs,level.PointInSector(ofs.xy),-Results.HitVector,2.,TRACE_NoSky);
 						if ( at.Results.HitType != TRACE_HitNone )
 						{
 							let wp2 = new("WallPenetrate");
+							wp2.hitline = at.Results.HitLine;
+							wp2.hitside = at.Results.Side;
 							wp2.hitpos = at.Results.HitPos;
 							wp2.hitdir = at.Results.HitVector;
 							if ( at.Results.HitType == TRACE_HitWall )
@@ -248,6 +252,8 @@ Class SilverBulletTracer : SpreadSlugTracer
 				{
 					penetration = max(0,penetration-i*4);
 					let wp = new("WallPenetrate");
+					wp.hitline = Results.HitLine;
+					wp.hitside = Results.Side;
 					wp.hitpos = Results.HitPos;
 					wp.hitdir = Results.HitVector;
 					if ( Results.HitType == TRACE_HitWall )
@@ -267,6 +273,8 @@ Class SilverBulletTracer : SpreadSlugTracer
 					if ( at.Results.HitType != TRACE_HitNone )
 					{
 						let wp2 = new("WallPenetrate");
+						wp2.hitline = at.Results.HitLine;
+						wp2.hitside = at.Results.Side;
 						wp2.hitpos = at.Results.HitPos;
 						wp2.hitdir = at.Results.HitVector;
 						if ( at.Results.HitType == TRACE_HitWall )
@@ -444,6 +452,7 @@ Class SilverBullet : SWWMWeapon
 			p.angle = atan2(hitnormal.y,hitnormal.x);
 			p.pitch = asin(-hitnormal.z);
 			p.target = self;
+			t.WallPenetrateList[i].hitline.Activate(self,t.WallPenetrateList[i].hitside,SPAC_Impact);
 		}
 		if ( (t.Results.HitType != TRACE_HitNone) && (t.Results.HitType != TRACE_HasHitSky) && (t.Results.HitType != TRACE_HitActor) )
 		{