Fans Fight at 49ers-Colts Game, Helpful Person Films It

 Just kidding. I'm sure there is a perfectly valid excuse for grown men to engage in physical violence and get kicked out of a professional football game. Perhaps someone suggested Andrew Luck barks out the signals too loudly. Perhaps someone suggested Jim Harbaugh would make a poor dinner guest.

Whatever the impetus, cooler heads did not prevail. 

[H/T: The Big Lead]