Buried - Tough to describe this without giving anything away. I knew nothing about it going in, and I think that's the best way to see it. Basically, Ryan Reynolds wakes up in a coffin. He spends the duration of the movie trying to free himself before he suffocates. Very intense to watch. I'm not all that claustrophobic, but this movie made me feel like I was.
If you enjoyed the "buried alive" scene in Kill Bill 2, this one takes that to another level of anxiety. It's incredibly effective at portraying the panic and desperation that the protagonist is feeling. Ryan Reynolds was a strange casting choice IMO, since all the things he does best are thrown to the wayside. While I don't really buy him as this character on paper (he's a truck driver), all of the incrongruent features he possesses are masked by the setting and circumstances he finds himself in. I was definitely sold that he was stuck in a wooden coffin, struggling to survive. 8/10