A really great movie while watching, but I doubt I could watch it twice

Rating: 5/10 (11 April 2005)

Thriller about two guys who find themselves chained to opposite walls in an old shower room with a dead guy between them and the kidnapper playing riddles with them. The killer, who is never to be seen, sends them little messages, already hidden in their pockets or in places in the room. Messages like the one telling the Doctor that he has to kill the other guy within the next few hours or his wife and daughter will be killed. Messages like two hidden saws that they find that are not good enough to cut the chains around their ankles but definitely good enough to cut through those ankles. The doctor remembers having heard more about this killer, because he was once the main suspect himself. This killer loves to play such mind games where the abducted people usually end up killing themselves while trying to follow the game. Only one ever escaped.
The movie is very tight, fast with a good story and I haven't found one second to catch my breath, and that for a movie of 100 minutes. I really enjoyed it (if one can say with such a grisly movie that one enjoyed it), but the strange thing is, I came out of the movie and boom it was gone. I didn't feel anything special afterwards, I wasn't stunned, scared, awed or whatever. It's like I have seen the movie 10 years ago, not 10 minutes ago. So I can't give it the 8 points that I would have given to it while it was on.