The Incredibly Strange Creatures Who Stopped Living and Became Mixed-Up Zombies!!? was originally titled The Incredibly Strange Creatures or Why I Stopped Living and Became a Mixed-Up Zombie until Columbia Pictures threatened legal action over the presumed infringement on their Stanley Kubrick film Dr. Strangelove: or How I Learned to Stop Worrying and Love the Bomb (1963).

The final budget for The Incredibly Strange Creatures... was $38,000, more than three times Steckler's budget on Wild Guitar (1962).

The film's shooting schedule ran for 11 days.

The film's director of photography was Joseph Mascelli, author of The American Cinematographers Manual (1960) and The Five Cs of Cinematography: Motion Picture Filming Techniques (1965).

Camera operators included émigrés László Kovács and Vilmos Zsigmond, who shot the carnival footage and rode the rollercoaster seen in the film while operating a handheld 16mm camera.

Carnival interiors for The Incredibly Strange Creatures Who Stopped Living and Became Mixed-Up Zombies!!? were filmed on a makeshift soundstage built on the seventh floor of a temple in Glendale, California.

A 17-year-old girl named Bonita Jade had originally been cast in the part of Angela but when she decided she'd rather go out with her drummer boyfriend than shoot her first scene, Steckler grabbed dancer Sharon Walsh and promoted her to leading lady on the spot.

While he was shooting The Incredibly Strange Creatures..., supporting player Titus Moede was also appearing in Captain Newman, MD with Gregory Peck.

Moede has claimed that he got fledgling actor James Woods work as an extra on the set of The Incredibly Strange Creatures....

Briefly glimpsed in the cabaret scenes is Jeanette Briggs, wife of Hollywood heavy Mike Mazurki and a critic for the Glendale News-Press.

The junked car that Atlas King is seen working on midway through the film is Ray Dennis Steckler's old Nash Rambler.

During production, Atlas King loaned Ray Dennis Steckler $300 from his own pocket to help him continue shooting when he ran out of funds.

The climactic beach chase scene was filmed in Oxnard, California.

The boots Steckler wears during the chase over the rocks are actually a size and a half too small because the boots he had worn throughout shooting had been washed out to sea on a stunt dummy.

The Incredibly Strange Creatures Who Stopped Living and Became Mixed-Up Zombies!!? was later paired on double bills with Arch Hall, Sr.'s The Sadist (1963).

The Incredibly Strange Creatures Who Stopped Living and Became Mixed-Up Zombies!!? was also released under the title The Teenage Psycho Meets Bloody Mary and in some drive-ins in the south was presented as a live spook show where masked volunteers, dressed as zombies, emerged from the shadows to terrorize patrons in their cars during the film's climax.

Compiled by Richard Harland Smith

Sources:
Ray Dennis Steckler audio commentary, The Incredibly Strange Creatures Who Stopped Living and Became Mixed-Up Zombies!!? DVD
Ray Dennis Steckler interview by Boyd Rice, RE/Search: Incredibly Strange Films
Ray Dennis Steckler interview by Will the Thrill, www.Thrillville.net
Arch Hall, Jr. interview by Tom Weaver, Earth vs. the Sci-Fi Filmmakers: 20 Interviews