I was burning through some repetitive work with this movie on in the background. I had low expectations, and then IceMan showed up, and then (spoiler) there were some nice boobs which ticked off a checkbox for making a good bad-horror movie. The characters were a bit whack and irrational, but how else are you going to write them into constantly returning to an abandoned mine. There's a beautiful lake nearby, but they're like "Hey, let's go back to the mine and drink more PBR." They try to add some un-reliable narration by introducing a trivial amount of drugs. I was like, "Is that ALL you're going to take? Can you even get buzzed from a couple Tall-Boys?"
Standard cookie-cutter characters, but one was British this time, and that was never really explained. Was that a fake accent? It was nice to see the story almost work, but the ending left a lot of unanswered questions, like, "Why is this happening at all in the first place?", and "Why don't they just leave? It's a nice day." All in all, it's kind of like a more enjoyable version of "The Hole", combined with "Vivarium" or something.