This is an original film, although over two decades later a film called "Willard" came out and subsequently ripped off some of the concepts in terms of the story of killer snakes and changed snakes into rats, but "The Killer Snakes" is a much better film by far. "The Killer Snakes" will cater more to the grindhouse horror lovers of filmlore, but this is indeed an original film. It's maniacal, sick, twisted, perverse and dramatic.