There is a bug, when you reboot physics engine, the waters and blood from previous level is stuck on the screen, even though it doesn't move, it's annoying.
There should be a way to put a weapon of any kind to a ragdoll's hand or other body parts.
For example, if you try to weld a lightsaber or other cutting weapons at a ragdoll's hand, it will cut it's own legs. (+) if you agree.