Crowd fight ends after fan knocks himself out

Judging by the looks of the arena, it may be some small town in Canada or the U.S., but the fans appear to be enjoying the game. Two fans get into a fight in the stands, but nothing really happens of it. It's what happens after as the one fan stupidly knocks himself out! Check it out:

I guess if the other guy couldn't do it himself he might as well help him out!