Themroc

Themroc is a 1973 French film by director Claude Faraldo. It was produced by Franois de Lannurien and Helne Vager and its original music was composed by Harald Maury. Made on a low budget with no intelligible dialog, Themroc tells the story of a French blue collar worker who rebels against modern society, reverting into an urban caveman. The films scenes of incest and cannibalism earned it adultsonly ratings. It was the first film to be shown in the UKs Channel 4s red triangle series of controversial films in 1986.

Source: Wikipedia