Continuity: When the victims first find the saws and are vigorously trying to cut the chains: The wide angle of Larry sawing, shows him cutting at the chain. Close up he is cutting the padlock.

Revealing: When Larry notices the clock on the wall, he puts his hand on a pipe. Watch the pipe, it bends in and foams out when he takes his hand off it, revealing it to be made of foam.

Continuity: The mark on Larry's face changes throughout the film.

Continuity: Adam grabs the bat with both hands right after he sees the laughing doll in his apartment (the view is from behind him). The very next shot shows the front of him, but he has the bat in one hand, and the camera in the other.

Continuity: In the scene where. Lawrence and Adam find the 'X' on the wall, there is a continuity error. Right after they find the 'X', the lights are turned on and there is the shape of a square on the wall (the cavity where the box is hidden). Before they find the 'X' there is no box or any dirty lines where the cavity is.

Visible crew/equipment: You can see the shadow of the camera on Dr. Gordon's sleeve when he is talking to Diana sitting on her bed.

Visible crew/equipment: In the scene where Larry leans over to get the picture that Adam tossed his, as he leans over, near the door you can see wires and cords belonging to the camera equipment.

Factual error: After the doctor speaks on the cell phone for the first time and the line goes dead, there is a dial tone. There is no dial tone on a cell phone.

Audio problem: When Dr. Gordon is dialing 911, we hear one low tone then two higher tones. On touch-tones phones, 1, 4, and 7 are the lowest tones while 3, 6 and 9 are the highest. Gordon would have dialed a 1, 4 or 7 first and then a 3, 6 or 9 twice in succession. Possibly 1-9-9 for Emergency?

Continuity: When Tapp and Sing go to Jigsaw's place and find the guy strapped to the chair they uncover him then re-cover him to see what Jigsaw is going to do. When Jigsaw pulls the sheet off, one side is still caught on the drill bits. But when he starts the drills the sheet is completely clear of the drills.

Continuity: In the car chase scene, Zep is seen driving a late 80's Ford Bronco II (could be a Ranger pickup because we only see the front). When he arrives at the warehouse, the truck has changed to an early 90s Ford F-150.

Continuity: When Adam is walking into his apartment, his camera has a short lens on it. He then rounds the corner and goes into the darkroom and the camera has a long lens on it.

Audio problem: When Larry goes out into the hall after seeing to his daughter, Ally starts to talk to him but her mouth doesn't move with the words.

Other: When Larry is taking the cigarettes out of the box, look at his hand. It has a white paint drop or white dust on it, but throughout the scene it disappears and reappears.

Other: After Cary Elwes saws off his foot, he throws the hacksaw across the room. However, no blood spatters on the floor (from the blade), as one might expect.

Other: Danny Glover's wall has hundreds of newspaper clippings attached to it. At one point in the film, we are shown some of the headlines, i.e. "Psychopaths teaches sick life lessons." If you actually read the text below you'll find that it bears no relevance to the headlines whatsoever. (You may need to use the zoom facility.).

Continuity: Jigsaw's thumb moves between shots after Adam gets the mini cassette recorder out of his hands. You can see Jigsaw's thumb, in the closeup shot, slide down to a position where it's lying horizontal and flat on the floor as the mini cassette recorder is being slid out of his hand. In the next shot, an overhead, you can see that his thumb has moved and is now more curled and in a more vertical position to where just the tip is touching the floor. Jigsaw isn't dead, so he could have moved, but this shot is an *instant* cut, he had no time to move.