I wonder what started it? You can tell initially they really did not want to fight. It was the excitement of the crowd watching and no one wanting to back down. Basically one kid was stronger and a better fighter than the other. I like the comment about why cant blacks fight one on one. Its not a black thing to gang up on someone. That is actually a learned behavior. Basically it is like this.. Your friend is pissed so you become pissed and somehow in the rage of things you decide to throw in some blows as well. Usually if a one on one fight is agreed to in the beginning only a one on one fight happens. Judging by the behavior of the friend of the more aggressive fighter. I think he was more trying to get the weaker fighter to stop getting up so to not endure anymore punishment. You know, just stay down, the fight is actually over, lets not turn this into anything else type of thing.