this movie be great from start to finish about a group of med student that get together and literally kill each other by stop their heart and then revive themselves . they then research what happen from the near death experience . a each one go through the experience and they become haunt by their deep fear that seem to materialize a reality . this range from dead kid with hockey stick to dead father that seem to be upstairs . the cast be first rate and oliver platt be hilarious in one of the best role of his career . i be not a big keifer sutherland fan but even he do an excellent job . this be a movie that i can watch over and over .