Free Beer & Hot Wings: Johnny Football Flips Off Washington Redskins Bench, Gets Reprimanded [Video]
They were obviously heckling him a bit because of his poor play in the NFL exhibition game and it was irritating Mr. Football.
So what did he do? He flipped them the bird as he was running back to the huddle.
It definitely didn't go unnoticed and it aired on ESPN, but Manziel seemed unaware until he was notified by Browns PR guy Rob McBurnett.
The "oh damn!" reaction on Johnny Football's face is priceless.
Source: Free Beer & Hot Wings