Watch: Angry Dabo Swinney barks at referee on sideline

Dabo Swinney often comes across as a compose head coach, but he has his moments when he can become frustrated.

Midway through the first quarter of Monday’s National Championship Game between Clemson and Alabama, ESPN showed Swinney yelling at a referee on the sideline:

Swinney could be seen saying “do your job” to the official. ESPN showed Swinney barking at the referee after Alabama converted a third-and-short in the red zone, just before the Crimson Tide scored their second touchdown of the game. ESPN did not state what had set off Swinney.