One of the best horror movies in YEARS!

Rating: 9/10 (4 January 2008)

All right, I'm going to try to do this one without spoilers. A short summary of the movie goes like this: This movie has a bit of background in the beginning, establishing that there's basically this group of chicks that gets together to do some adrenaline-pumping activities every year together (no, not that kind). First, they go white-water rafting, and I won't spoil what happens after that. The next year, they get together with a few more friends and decide to go spelunking. They set out the next day, after spending a night in a cabin. For what happens after this point, look at the genres this movie is in, and decide where the movie goes from there. ;) All right, on to the goodies! Even as a horror/thriller fan that's seen a whole lot of these types of movies and is getting a bit jaded, this movie was GREAT! There are no stupid people in this acting in moronic ways to move the plot along. No "Let's split up", no moments of "Hey, what's that noise, let's go check it out (unarmed)", and best of all, no stupid bimbos (with or without clothing torn in creative ways). There's not even really any moments of "Wow, that was dumb, I could have done way better". This movie is chock-full of intelligent women who can take care of themselves, and that's certainly a breath of fresh air that this genre DESPERATELY NEEDS.
Now, the acting? Awesome, considering there's no actresses in here you've probably ever heard of. Plot - really sound. What they face in this movie is very realistic, and not really that implausible at all. Also, when you're watching this, you won't even be able to believe this wasn't actually filmed in a cave. Probably my favorite part of this movie was the atmosphere - incredibly tense, this is one of those movies where you shouldn't even bother getting the popcorn, because there's a pretty good chance you might your tongue off at some point.
I just saw this a half hour ago (I'm still shaking), and I'm trying to think if there's anything I didn't like AND how to tell you in a non-spoiler way. Well..occasionally they're a little hard to understand, since a couple of the women have fairly thick UK accents. Oh, and there's a particular pool in the cave that may render a "Bwah? How did that get there?". However, that's IT.
Bottom line? Rent it if you want, but this one's well worth the buy. Make sure you don't get it confused with the Cave (which came out just after this movie), because the Cave is absolute dreck, especially compared to this. Also, if you're in the U.S., make sure you get the unrated version, since our version over here got cut.
Oh, and one more thing. You won't want to go spelunking after this one. Ever.