Another King classic that manages to scare the pants of you without resorting to supernatural junk. It's right up there with Jaws and a few other notable "creature feature" stories that manage to make the natural world as horrific as anything the imagination can dream up.

I think the scariest part about this story is how it turns man's best friend into his worst enemy, and we realize that it can literally happen to anyone at any time. Scary stuff.