Because I am obviously a masochist, I have subjected myself to almost the entire cinematic oeuvre of Mexican exploitation director Rene Cardona. This one might just edge out "Doctor of Doom" to receive the dubious distinction of being his best work. It's VERY gory with decapitations, eyeball-ectomies, and several scenes of real-life open-heart surgery. Like any great Mexican exploitation flick it contains both scenes of gratuitous nudity (muchas senoritas desnudas)and gratuitous wrestling (female wrestling that is--alas, no Santo). It has a mad doctor and a hilarious, mestizo version of Igor. The bizarro plot involves the mad scientist transplanting the heart of a gorilla into his dying son. The result, as any scientist might have predicted, is that the son transforms into a half-man/half-gorilla who rapes a lot of Mexican babes (somehow without removing his pants) and kills a number of people with his bare hands. This, of course, requires yet another heart transplant at which point the movie starts to get a little ridiculous. . .
Some may find this film a tad offensive, but it's funny as hell if you're in the right mood. The funniest part of all might be the English dubbing in the US version. The actor dubbing the doctor, for instance, insists on pronouncing the Spanish name of the son, Julio, with an English "J", calling him Jewel-i-o. (It never occurs to him to just anglicize the whole name and call him Julian or something). And why was the US version called "Night of the Bloody Apes" when there's really only one "ape" in the movie? All in all, this film is a valid candidate for the "So-Bad-It's-Good" Hall of Fame. A true anti-masterpiece.