Usually, if I see two people about to go at it, both equally willing, I just ignore it and go about my business.. but if I see two guys trying to instigate ish with one guy, then I'll break the fight up. Personally, it will take a lot to get me to fight someone, I'm a big guy, I already know I can hurt someone pretty bad.. no need to prove myself. Although, if someone messes with my family or friends, then....