You stay classy Toronto Blue Jays fan.
There are lots of excuses for bad fan behavior, but not much for this.
Watch the video below. Baltimore Orioles Leftfielder Nate McLouth makes a fantastic running catch on a foul ball, falling into the stands.
McLouth gets up, ready to throw ball back to the infield when a beer comes flying from the stands behind him.
Thankfully, Rogers Centre security found the dumb ass fan and tossed him from the game.
Here's the video (Thanks MLB.com):