Starring Boris Karloff, Julissa, Carlos East, Isela Vega, Yerye Beirute
Directed by Juan Ibanez
(actor & director credits courtesy IMDB.com)
A scientist and his assistants discover a creature made of living rock underground that feeds on the chemical generated in the human body when experiencing extreme terror.
According to IMDB, this is one of a quartet of horror films made in Mexico that incorporated scenes featuring Boris Karloff filmed in America by director Jack Hill. They would be among Karloff's last films, and do not have a reputation of quality. This one is certainly watchable, and does an effective job of presenting the terror-filled "fear chamber" the scientists create to shock young women into providing the chemical to feed the creature. However, while Karloff is always worth watching, the rest of the film doesn't measure up, with poor special effects standing in for the creature, and the transformation of a dimwitted lab assistant into the movie's central villain coming off as pretty comical.