Continuity mistake: In the beginning where Fletcher observes Andrew drumming for the first time, Fletcher hangs his jacket on a hook. A few seconds later after Andrew notices he's gone, there's no jacket hanging there. Shortly after that we hear the door open and it's reappeared. (00:03:20)
Continuity mistake: In the last scene, when the drummer starts the "caravan" song, the bass player on the left starts playing. But in the next shot he isn't.
Chosen answer: He was fired from the university, but the band at the end was a hobby group he had started conducting for.