Fighting swep or animation

I have always wondered if it was possible to make some kind of swep or something that you can use to do some crazy hand-to-hand combat move. Such as, you can walk up to something or someone and grab thier head, snap the neck or possibly slit a throat or decapitate an NPC. Does this seem clear enough? I can’t find a way to express the idea.

Anyways just wondering if it is possible.

If only dark messiah of might and magic had v_models D’=