Bubba Gracie is a heavy, life like grappling dummy used in the martial arts school Gracie University. It’s good for practicing when there is no one else around. To prank others in the school, Rener and Brian team up and dress Brian as the dummy. Then they put him in a dark office and tell people to bring him to practice. When they reach for the dummy, the dummy reaches back! They leave a camera on to record people soiling themselves. Classic.