Buried

This movie basically has only on character.

You hear people's voices, but you don't see them.

You only see a guy who somehow ended up with being buried alive and struggling to get out from the coffin.

The setting is quite interesting.

I don't think you get frustrated by watching him in the coffin because he probably does whatever you think he should do eventually.

This movie got me really interested.

Because I expected that there were so many hints that are relevant to the truth.

You can actually guess millions of things from the conversations he has on the cell phone he finds.

I didn't like the ending much because I feel some questions are not solved

But you will enjoy this movie if you don't care small details.

In fact, I really enjoyed.

The tension is created very well.

You actually share the same experience with the character, Paul, because what you see is what he sees; you don't see anything else, which I thought is really interesting way to make a movie.

The structure fits the story quite well.

Also the acting is very good.

You might get annoyed just because he is the only character you see, and he is panicked, but I think his acting creates the tension and represents the mentality of being buried lol

IMDB