Yes i have been in several, mostly before jr. high but i have also been in quite a few after, most of which stemmed from something going on with my best friend who loves to fight, but loves to fight multiple people most of all because he is a bad ass he always wants to run up on a group of guys and just talk shit when its just me and him but we have done pretty good so far
my friend is a cage fighter,mma,nhb whatever you call it and he has a website that have clips of some of his fights
http://www.ultimatedefense.com/rob.htm check it out its pretty cool
