if you understand it you will love it . not a film for those want to be spoon feed . at first look it egads not that kind of stuff again . but it much more than mememto and butterfly effect and dead end and sixth sense or other great movie of ( similar . ) paranormal genre . this be truly original and be probably closer to only one of the above mention movie . but to say which one would spoil it . i really do not want to write a review and certainly it hard to get in ten line and but the low review give previously may have be from those who do not understand the movie . you get ta have brain to enjoy this movie .