In what appears to be a video of the marching band's halftime show, a drumline steps forward for a percussion interlude, the cheerleaders chant to the beat, and the crowd smiles and claps along. In other words, everything's pretty typical--until it's not.
Watch what happens when the teen playing the multi-tenor quad drum suddenly takes off his drum and hands it to two friends. A good performance suddenly turns into an awesome one, and everyone, especially that drummer, seems to... well, flip (pun intended!).