If today we have a lot of films to choose from when we want to shock ourselves beyond believe: from barely serious, yet distrusting films by Eli Roth through intense hyper-violence by Coralie Fargeat or depressing looks at the world by Lars Von Trier all the way to deranged films like The Serbian Film, in 1970s you had probably only one true contender for such a level of derangeness. And it was the Tobe Hooper's 1974 film The Texas Chain Saw Massacre.