The Rise of Jengo (1970)

(from IMDb) A nightmarish fright fest when the beast comes back home! Jengo wants revenge! He is the evil from your nightmares, waiting, hunting, blood thirsty for new prey to haunt. He is worse then any nightmare! He is a nightmare! He is THE nightmare and the scary thing is.... HE IS REAL! This film is a horror/gore-fest filled with disturbing cannibalism like elements, full of sickly twisted torturous events! and is truly mentally disturbing and shocking! Its the stuff of nightmares... Your Nightmares!! (That's a lot of nightmares!)