The original title was "The Incredibly Strange Creature: Or Why I Stopped Living and Became a Mixed-up Zombie." Columbia Pictures threatened to sue writer/director/star Ray Dennis Steckler, accusing the title of being too similar to their upcoming Stanley Kubrick film, Dr. Strangelove or: How I Learned to Stop Worrying and Love the Bomb (1964). Steckler, amazed that Columbia would feel so threatened by a $38,000 film, phoned the studio to straighten things out. He made no progress until he demanded that Kubrick get on the line. When Kubrick picked up, Steckler suggested the new title, Kubrick accepted, and the matter was dropped.
Bonita Jade was originally cast as Angie. She backed out the night of Angie's first scene, so Ray Dennis Steckler quickly picked dancer Sharon Walsh to replace her. If you look closely, you can see Walsh dancing in the musical numbers.
The trivia item below may give away important plot points.
A dummy was used for the scene where Jerry falls from the cliff, at the end of the film. The dummy was filmed falling from the cliff, but it was so obviously fake that Ray Dennis Steckler decided not to use the footage.