Led Zeppelin: The Song Remains the Same (1976)

The members of Led Zeppelin are called back from vacation by manager Peter Grant to play Madison Square Garden. The film is enhanced by each of the band member's personal fantasies (hallucinations?), such as the opening scene (which is awfully confusing the first time around) in which Peter Grant, dressed in a 1930s black gangster suit drives a 1930s black Ford to a house and blasts everyone with a machine gun.