lines of attack. if they're going for the stomach, it is a sewing machine kind of action. >> is your first order of business deflecting or getting the knife from them? >> i'm going to either gain control of the weapon or go to a returning blade technique. where i gain control of the weapon and return it to sender. >> show me. >> okay. the thing about knife defense is there's no magic bullet. any technique can fail. any technique can go wrong. if there's multiple opponents, that can get difficult as well. here, this sort of thing, yeah? if we've got the knife held up close, okay, yeah, pull, hit. now i'm going to force this thing back into your sternum