Schlock (1973)

Schlock
Comedy, Horror, Science Fiction
A quiet suburb in Southern California is terrorized by a mysterious murderous monster living in a cave. As the bodies pile up -- with incriminating banana peels always near by the crime scene -- a group of teens stumble on the guilty party: a 20-million-year-old Schlockthropus, an ape-like creature with a sense of the absurd.
Starring
John Landis, Saul Kahan, Joseph Piantadosi, Eliza Roberts, Tom Alvich, Walter Levine, Harriet Medin, Eric Sinclair, Charles Villiers, Ralph Baker
Directed By
John Landis