I don't agree with this killer instinct thing. Because, when people just get mad and try and fight, they start doing retarted things like the famous windmill attack and really dont fight well. Wouldn't being calm during a fight help more?? I mean, when have you ever seen a street fight where the fighters used martial arts?? Well i havent....all i see is 2 ppl swinging arms at eachother. Nobody ever gets knocked out or anything like that. But if you're calm, you can think about how you'll attack. Like instead of using the instinct and trying to kill the person (but really just swinging ur arms around) you can attack intelligently. I dunno, maybe im sounding dumb to you, but it makes sense to me, lol