Flo Lawrence said she felt somehow abused by Klaus Kinski in the scene just after the topless dancing one: "Kinski starts grabbing me and touching me in places that he had no business touching me. My acting chops went out the window, I should have slapped him, but I was just so shocked and no one yelled 'Cut' at that point. I guess it was a split decision in that moment on my part that I at least maintain my professionalism so I stayed in the scene. Kinski was way out of line. I don't think we shot that over and I think that scene is in the film also in the moment of what was going on."
Writer and Director David Paulsen was told by Producers Menahem Golan and Yoram Globus that he had one month to have a screenplay ready that could be shot for under a million dollars, and that could feature Klaus Kinski, who was under contract. Paulsen also had only one month to secure a crew and shooting locations.
According to his autobiography 'Kinski Uncut', Klaus Kinski had an on-set affair with actress "Catherine Burkett" (clearly Donna Wilkes). "Catherine Burkett plays my daughter in the Golan flick. When I fuck her in my hotel room, I really think I'm fucking my daughter. Scenes from the movie emerge in me: I see my daughter naked in the shower and I can't take my eyes off her, can't stop thinking how excitingly slutty she looked in ''my wife's' clothes," Kinski wrote.
Wilkes never confirmed the relationship, but her co-star Flo Lawrence said, "I think Kinski was rough on Donna Wilkes, who plays Kinski's daughter in the film; she might have had a lot of black and blue spots on her. I think Donna Wilkes did get along with him regardless of any rough handling. Kinski presented her with some perfume as I recall."
Director David Paulsen revealed that the sex scene between Klaus Kinski and Marianna Hill was difficult. "Oh yeah. Marianna was mostly nude and he was Klaus Kinski. That was a difficult scene to shoot and not at all pleasant for Marianna. Klaus went over the top a few times. She was very strong though," he said.
The killer is depicted as driving a 1979 Mazda 626. Julie drives an orange 1973 Volkswagon convertible. Alison drives a 1971 Datsun 1200.