This movie is the epitome of a thriller from start to finish. The very first scene of the film gets your heart pumping and it only lets up once or twice before it's done. While a few scenes were uncomfortably gross, they fit with the rest of the movie and added to the continuously heightening tension. After walking out of the theater, my friend's watch told him that his heart rate for the past hour had been as high as it is when he has just finished a five mile run, so yeah, it's a pretty intense movie. I haven't enjoyed being so anxious in a long time.