Watched Rattlesnake on Netflix this morning before my morning run... it was okay. I'd probably give it a 6 out of 10. IMDb gave it a 4.5, but I'm a fan of horror/thriller flicks in general, so I enjoy even some of the lesser horror films.
If you're frightened of dying, and you're holding on, you'll see devils tearing your life away. But if you've made your peace, then the devils are really angels, freeing you from the Earth.