Fantastic movie. Made with only a budget of 130k, I understand it grossed in excess of 50mil. It is a story about a couple who goes scuba diving on a vacation, and the boat driver miscounts the number of people on the boat and leaves the couple behind.

Every divers worst fear turns into their nightmare. If you like psychological movies this is it. The dialogue is fantastic, scenery is beautiful and the movie runs at a quick tense pace (it is only like 81 minutes long).

Kind of like a short Stephen King novel, he writes about simple mistakes that turn into terror, this is like that on the big screen.

It is based on a true story.