5. Nick Cannon. While trying to film a promo for America's Got Talent in the middle of a Knicks game, Nick Cannon was booed off the court at Madison Square Garden. He was supposed to pretend to sink an impossible trick shot, but he could barely get his set-up line out before spectators began to (loudly) protest being forced to be part of an ad for the show. Three minutes of booing later, and Cannon was forced to give up. It could have been worse. If this was in Philly, everyone involved would be dead by now.