The mascot for the University of Colorado-Boulder got carted off the field at a football game last weekend . . . after shooting himself in the groin with a T-SHIRT CANNON. He tweeted later on that he was okay though.
It's hard to tell, but it doesn't look like he actually got hit with a shirt. It looks more like the cannon just backfired. But at point-blank range, even a shot of compressed air could do some damage.
Here's video of him being carted off the field