A rabbit punch did not stop Toney or Wlad. A haedbutt could have. Nvertheless, a rabbit punch thrown with full force could do extremely serious damage. No argument with that. It could crippe someone, though I know of no such incident in boxing. A head butt launced with full force could kill someone, though I know of no such incident in boxing. IMO it's six of one a half dozen of the other. But I am not about to test it with anyone, particulaly Sam Peter.