Amateur movie with Big budget

Go in cold, and you're likely to emerge with your blood boiling. This has to be seen to be believed.

Exactly the movie you think it is, but not the movie you want it to be.

Just intense enough to provide a much-needed diversion, just lightweight enough to make you forget about it soon after it’s over. It’s not exactly “good,” per se, but it does what it sets out to do in terms of putting us on edge, which makes it … successful?