i have see many many movie and this just totally blew my mind . the trauma and the suspense be just amazing . i end so wound up in the psychological fear and philosophy of it and and relate it to reality . movie that play and challenge your mind be movie you do not forget and those that make you doubt your reality . a problem could be the quality and but that doesn not bring down the essence of the movie . the idea it self be brilliant and the end leaf you just completely shocked and with the question for you to seek the answer . i just totally love it . so many clue and twitch and puzzle . one of the best movie ever and hand down .