Cowboys Fan Knocks Out Eagles Fan With One Punch at AT&T Stadium [UPDATE]

Eagles and Cowboys fans don’t mix. Here’s video from last night’s Cowboys – Eagles game in Dallas. Two fans were yelling in each others’ faces when the Cowboys fan hits the Eagles fan square in the jaw. The Eagles fan goes down immediately. This comes three weeks after an Eagles fan knocked out a Giants fan in the bowels of Philly’s public transportation system.

UPDATE: These dudes are apparently brothers.