Punch Buggy (also know as piggy punch) is a game played by Bart Simpson and Lisa Simpson (and later all of the kids of Audrey MCconnell's third grade class on the bus). It's based on the Volkswagen beatle game. When you see a volkswagen bug, you punch someone and yell the color. Plus two if you flinch. After Bart told how to play the game, the kids on the school bus saw a Volkswagen beatle dealership and engaged in a massive punch buggy game, then Otto punched two kids (or one twice) for flinching. After they got off the bus, all of the kids were groaning in pain and rubbing their arms.