Well, a guy in the book just shit himself to death. That's creepy as fuck. You mix that in with every day stuff and you've got a guarenteed fright. It's like saying 'you think you're safe? well guess what' then describing with detail how one day you could just wake up with a problem that results in you shitting yourself to death. It's just too possible to pass off. I'm not really keen on King as an author, but I'll give the fucker one thing: he can scare the shit outta me.