|violence toward animals||no|
|X was the real Y||It turns out that humans were the real gollums.|
Spelunking based horror movies should be easy, I'd probably freak out watching actual footage of narrow caves.
That said, I think this movie does a decent job of it. With the exception of the birthday-cake flashbacks I really enjoy the storytelling in this. It takes a long to time to get going and I appreciate that.
I didn't enjoy this as much as the first time I watched this [ed. maybe because I've seen 48 films in 22 days], but it's still a good horror film and worth the watch.