i fixed half the problem, the drop in FPS due to the rebuilding the wall caused errors in the speed parameter of TOK_RefreshPhysic, and the developer of easytok said that high speeds can cause errors (if you refresh at a speed of 1.7, it gives similar (but worse) errors, so the line TOK_RefreshPhysic(1.7/FPS,10) caused a high speed when with a low FPS. I found a work around, now i need to FIX it...