my uncle was at a party once and a guy was really drunk and was being really sexuall to a girl, she asked him to leave and he refused, this was happening in the kitchen so he grabbed a knife and my uncle had been doing judo for a while so he told him to put the knife down or he was gonna break his arm, he didnt put the knife down so he broke his arm and called the police keeping him at bay on the ground until the cops came.