Reynolds plays Caine, a gunrunner who becomes stranded in a small port in the Red Sea. He meets an attractive woman who propositions him to dive into shark-infested waters off the coast for scientific research. Caine realizes the woman and her partner are actually treasure hunters.
The film was based on the novelHis Bones Are Coral by Victor Canning. This was serialized in 1954 and published in 1955. The original screenplay was written by Ken Hughes. In July 1966 it was announced Gaumont Pictures would make a film from the novel, directed by Byron Haskin, starring George Montgomery and produced by Mark Cooper. It was to be called Twist of the Knife and to be filmed in Mexico in July. Filming did not proceed.
In April 1967 it was announced Twist of the Knife would be produced by Skip Steloff for Calderon-Stell and directed by Sam Fuller, his first film since The Naked Kiss. The cast would include Burt Reynolds, Arthur Kennedy and Barry Sullivan. The film was to be the first in a series of co productions between Skip Steloff, Marc Cooper's Heritage Productions, and Jose Luis Calderon's Cinemtographia Calderon. When Sam Fuller joined the project, he rewrote the script and retitled it Caine. He shared writing credit with John Kingsbridge. Fuller later said "I liked the idea of making a story where, for once, the hero is really the heavy, the heavy is the girl, there's another heavy, and you find out in the end they're all heavies." He elaborated, saying he liked "doing a story about four amoral characters... to show not only a double cross on a double cross but when we think we know who the heavy is, we find out the real heavy behind it all is the girl... I have the hero not only allow her to die, but he shrugs it off.I thought that was exciting... I had such fun because I went beyond the average switch of revealing the villain. I also didn't have the guy just let the girl go to jail; he lets her be eaten by sharks." Even before filming began, the producers announced they had signed Fuller to a four-picture deal, including a sequel to Caine.
Shooting
Filming took place for nine weeks in 1967, in Manzanillo, Mexico, which stood in for the Sudan. During production, one of the film's stuntmen, Jose Marco, was attacked and killed on camera by a white shark that broke through protective netting. The attack was captured on film and prompted a photo spread in Life magazine. The title was changed to Shark! to cash in on the controversy.
Post Production
Fuller supervised editing in Mexico City for four weeks. His cut was later re-edited by the producers without his approval. When Samuel Fuller finally saw the version that was released to theaters, he said he thought it was "terrible. I told them I wanted to restore my original cut. They said they didn't know if they could get it from Mexico." Fuller demanded the producers take his name off it. The producers refused.
Release
Critical Reception
The New York Times thought the film "still suggests the imagination of" Fuller.
Re-releases
The film was re-released by Hallmark in 1975 as Man-Eater to cash in on the success of Jaws. Advertising focused on the death of the stuntman in the film. The Los Angeles Times called this version "threadbare".
