CNN  —  Fifty years ago, two independent filmmakers named Tobe Hooper and Kim Henkel had a gruesome vision for a new kind of film. Their idea involved merciless kills, a chainsaw, a group of youths and a homicidal family with a craving for human flesh; all set against the backdrop of a sunny, countryside day giving way to a nightmarish evening. The pair didn’t have much else, other than a modest budget and few credits to their name. When “The Texas Chainsaw Massacre” hit theaters in October