Continuity mistake: When Shawn is teaching the new drummers not to look at their drums while they play, he and Devon play together until Shawn drops a stick. At this point, Dr. Lee comes over and starts playing with Devon, until Devon drops a stick. The drum stick falls from Devon's hand and bounces around on the field. In the next shot, Dr. Lee is talking to Devon, neither has moved, but now Devon has both sticks in his hand.
Continuity mistake: In the scene in the cafeteria where Ernest is pigging out, Ernest is shown eating half a burger, then the shot changes to his friends watching him. When the scene changes back to Ernest he's shown taking a bite out of a whole new burger, but only a few seconds went by. When did he have time to get a new burger?
Trivia: During the credits, you see the field show that MBC was going to put on earlier in the movie, but was not shown. During the show, all of the band members lie on their backs and sing the chorus of the song, and then get back up. During one shot panning across the field as the band members stand up, you can see one of the multi-tenor plays at the bottom of the screen struggling to put his drums back onto his carrier.