In the Beginning Was the End: The Truth About De-Evolution (1976)

Sinopsis

Several factory workers finish their day at work and get into a car. They drive to a club where they perform the song Secret Agent Man as a rock quartet. A man with a mask of a child named Booji Boy runs into a building where his father, a man named General Boy is waiting. Subsequently, a man gives a lecture by song on the subject of devolution.