This Is Spinal Tap
This Is Spinal Tap is an American 1984 rock music mockumentary directed by Rob Reiner about the fictional heavy metal music band Spinal Tap. The movie satirizes the wild personal behavior and musical pretensions of hard rock and heavy metal musical bands, as well as the hagiographic tendencies of rock documentaries of the time. Reiner and the three main actors are credited as the writers of the movie, based on the fact that much of the dialogue was ad libbed by them.