A somewhat silly New York Knicks fan, named Rob who went to watch a game in Madison Square with a friend goes to get some pop-corn and beverages at half time but fails to return to his seat as he gets lost. Then hilarity ensues as the entire arena is looking for him and trying to point him to his seat.
Of course "Rob" was not lost at all. He was part of another great, creative and hilarious prank by the famous Improv Everywhere group. Nevertheless the fans' reactions were 100% true and funny as hell. Just check out the video and the pics and see for yourself.
You can read all about it and see tons of pictures on Improv Everywhere.