A Bay of Blood (1971)
Also known by a few other equally evocative titles, including Carnage and Twitch of the Death Nerve, this mega-violent giallo from Italian horror master Mario Bava helped set the template for slasher films that would become screamingly popular a few years later, especially the Friday the 13th series. Visual effects artist and future Oscar winner Carlo Rambaldi (Alien, E.T. the Extra-Terrestrial) made sure the film’s murders were as memorably grim as possible. (Free with ads on Freevee)
