one of the best horror or suspense movie i have see in a long time . wow and it be a big surprise and stun at how good this movie be and sometimes a gem like this will surface but be rare . i expect a popcorn monster flick and a mildly diverting way to spend a late night but instead a very well make and direct movie with great acting and make with passion and heart . this be a movie that make you feel for the character and what happen to them and and it be film like you be there and it be really happen . i know some people in other review compare it to open water and but i disagree because i think open water be quite boring and mediocre and while this movie be the opposite and although superficially they be film in the same realistic style . the actor be unknowns and at least to me and but they all be very effective and convey the dire situation with frightening intensity and realism . the story be well do and flow smoothly and the plot be logical and appear to be something that could happen and all the action and thought of the character be quite what a person would do and think about . very believable and this make the movie more real because of it . i have tear in my eye at the end . i must say a movie seldom have this effect on me and this be how powerful and emotional this movie be do and i be suitably impress by the director and actor of this great movie .