This Week in Touchdown Celebrations: Why So Serious?
Bills receiver Steve Johnson lifted his jersey to reveal his undershirt in a touchdown celebration Sunday. The shirt said "Why So Serious?" Maybe The Dark Knight was playing on the team bus.
[There was a video here]
UPDATED: Thanks, DangerZone, for clarification: "It's because TO and Ochocinco refer to themselves as Batman and Robin. So he wanted to be the joker."