Like many other Stephen King movies, Cujo follows a particular formula. In this case, having an uncommon type of monster as the antagonist. Cujo is a St. Bernard (one of the biggest dogs on earth) and the monster in question. Why is he so vicious? He was bitten by a rabid animal and contracted rabies. What makes him terrifying is the fact that a mother and her son are stranded in a car that won’t run. Though Cujo isn’t one of the better Stephen King adaptations, it’s still one of the more recognizable. Especially if you have a fear of dogs.