The rocket powered fist, or whatever it is called, appears to cause some issues. Playing as weaponsmith, with a blood explosion mod attached, I was able in some circumstances (it was too chaotic to tell how) to clip through the wall. Later using the same weapon, I collided with a laser crystal and got the error:
FATAL ERROR in action number 1 of Step Event0 for object Player:
Unable to find any instance for object index '59' name 'Player'at gml_Object_Player_Step_0