Continuity mistake: When Tommy picks up his mother's cigarettes out of the toilet, one of them very obviously breaks in half. Yet a few shots later, they are all unbroken and normal.
Continuity mistake: About an hour into the movie, Tommy's face is injured by a shard of glass. The very next shot the injury is almost gone and in the next scene there is no evidence his face was ever injured.
Answer: It's taken from the score of 'Alive', written by James Newton Howard.
Tailkinker