diff --git a/example_behaviors.lua b/example_behaviors.lua
index cae9422..cd9b4f7 100644
--- a/example_behaviors.lua
+++ b/example_behaviors.lua
@@ -166,11 +166,11 @@ function mobkit.get_next_waypoint_fast(self,tpos,nogopos)
 
 		for i=1,4 do
 			-- scan left
-			height, pos2, liq = mobkit.is_neighbor_node_reachable(self,mobkit.neighbor_shift(neighbor,-i))
-			if height and not liq then return height,pos2 end
+			height, pos2, liquidflag = mobkit.is_neighbor_node_reachable(self,mobkit.neighbor_shift(neighbor,-i))
+			if height and not liquidflag then return height,pos2 end
 			-- scan right
-			height, pos2, liq = mobkit.is_neighbor_node_reachable(self,mobkit.neighbor_shift(neighbor,i))
-			if height and not liq then return height,pos2 end
+			height, pos2, liquidflag = mobkit.is_neighbor_node_reachable(self,mobkit.neighbor_shift(neighbor,i))
+			if height and not liquidflag then return height,pos2 end
 		end
 	end
 end
@@ -699,7 +699,7 @@ local function aqua_radar_dumb(pos,yaw,range,reverse)
 			ffrom, fto, fstep = 1,3,1
 		end
 		for i=ffrom, fto, fstep  do
-			local ok,h = okpos(mobkit.pos_translate2d(pos,yaw+i,range))
+			ok,h = okpos(mobkit.pos_translate2d(pos,yaw+i,range))
 			if ok then return yaw+i,h end
 			ok,h = okpos(mobkit.pos_translate2d(pos,yaw-i,range))
 			if ok then return yaw-i,h end
@@ -808,9 +808,9 @@ function mobkit.hq_aqua_attack(self,prty,tgtobj,speed)
 		end
 
 		local tpos = tgtobj:get_pos()
-		local tyaw=core.dir_to_yaw(vector.direction(pos,tpos))	
+		tyaw=core.dir_to_yaw(vector.direction(pos,tpos))	
 		mobkit.turn2yaw(self,tyaw,3)
-		local yaw = self.object:get_yaw()
+		yaw = self.object:get_yaw()
 		if mobkit.timer(self,1) then
 			if not mobkit.is_in_deep(tgtobj) then return true end
 			local vel = self.object:get_velocity()
diff --git a/init.lua b/init.lua
index d23b5dd..488a804 100644
--- a/init.lua
+++ b/init.lua
@@ -394,8 +394,8 @@ function mobkit.get_box_displace_cols(pos,box,vec,dist)
 	end
 	
 			-- traverse z
-	local zsgn = sign(vec.z)
-	local xsgn = sign(xoff)
+	zsgn = sign(vec.z)
+	xsgn = sign(xoff)
 	index=0
 	for z = floor(fpos.z + 0.5)+zsgn*0.5, fpos.z+vec.z, zsgn do
 		index=index+1
@@ -684,6 +684,8 @@ function mobkit.physics(self)
 	
 	-- bounciness
 	if self.springiness and self.springiness > 0 then
+
+		local colinfo = self.colinfo
 		
 		if colinfo and colinfo.collides then
 			for _,c in ipairs(colinfo.collisions) do