Nightmare Fuel / Cujo

  • Trapped in a car, with a rabid St. Bernard lurking around, and meanwhile, your four-year old son is going into seizures.
  • The three most particularly terrifying scenes post-rabies infection, are when the titular dog mauls his owner and the neighbor, when he takes a bite out of the mom while she and her son are trapped in the car, and the penultimate scene when, having gotten back up from a No-Holds-Barred Beatdown inflicted by the mom with a baseball bat moments earlier, he shows up unexpectedly just before he dies via gunshot inflicted to the head. Yep, Paranoia Fuel aplenty.
  • It's a small moment, but there is one scene in the book where Donna chances a look out the driver's side window, only to be face to face with a deranged Cujo. It plays way too well to the fear of looking out a window only to see someone looking in at you.
  • The scene where Cujo becomes infected with rabies. he's chasing a rabbit in a bright field until he tries to scare the rabbit out of a bats nest causing one of them to bite Cujo in self defence. It's like looking a peaceful dream that slowly turns into nightmare and you can really see how dark Stephen Kings mind went when he was drunkenly writing the story. However in the novel version this scene it's done more as a tearjerker because King wrote Cujos prospective on the scene and he was self loathing for the fact that he was bitten and deeply feared his owners being angry with him to a point where he feared that they would call him a bad dog.
http://tvtropes.org/pmwiki/pmwiki.php/NightmareFuel/Cujo