No indeedy there aren't.
The show was fairly uneventful compared to some of the stranger or tenser episodes. It was rather easy to figure out if the audience was paying attention. I saw huge chunks of the plot unravel before the show got around to revealing it, so it essentially wasn't that great of an episode.
For instance (warning, spoilers ahead):
The girl, Kelly, she should have given up and tried the phone later. Though of course it all worked out OK. Plus, why did she keep trying to dial 911? Once it doesn't work try something else. She kept her wits about her I'll definitely give her that though. I probably would've been too freaked out. Though the fact that her captor was slower than she was mentally had to be a big calming agent.
Another thing, the method of body disposal reminds me of Secret Window and the corn. It was far more disturbing than simply eating the body, which is gross, but typical serial killer fare. The method of turning it into acceptable food stuffs is freaky. What have I bought at the store that used to be people? (I know I know, a lot probably because people didn't used to be buried so thoroughly).
But the real grabber was the ending. That is what made the piece a season finale. It was frightening and scary; and is the person really leaving?