the main problem of saw be relate to the tremendous script mistake that only a uncritical spectator will just obviate . the main question be what be the purpose of the killer in his lying in the middle of the floor . the film try to show that the killer aim be to cause evil and destruction in his victim and he love to play with the life of other people and to feel control over their the fear and debility . so why do he just pretend to be dead between the two main character . a tremendous unlikelihood represent can a man pretend to be dead for more than one or two hour without move a single muscle or even without breathe in order not to be discover by two men who be in the same room . it have not sense at all except to be the final ( d ) effect of the movie . the killer seem to have always the control along the plot and if it lie like a dead body this can not be possible . finally and it doesn not work . the right place for the killer should have be a darker and untouchable shadow behind the false shadow ( the male nurse ) but not the floor of the white room . the director shouldn not have show the killer face and maybe the site where he be hide . then and the film would be a quite good thriller . however and saw be just a fiasco . hitchcock and please and come back .