Continuity mistake: When Amanda and Daniel entered the bathroom from 'Saw', Adam's body is shown with his right leg shackled. However, in 'Saw' and in Adam's death flashback in 'Saw III', his left leg is shackled. (01:14:10)
Continuity mistake: After Amanda falls into the pit of syringes and is dragged out by Eric's son, she is covered in blood from being stabbed with many syringes, but in every scene after that she has no blood stains on her skin or clothes. (00:52:25)
Continuity mistake: When Amanda is thrown into the pit of needles, in some shots there is only one, while in others, there are two or more stuck in her back. Also, in some shots the needles are pointed at an angle, whereas in others, they are pointed almost straight up. (Uncut Edition) (00:51:20)
Continuity mistake: When Matthews' friend is watching the puppet on TV at the beginning of the movie, the channel indicator on the television keeps changing from displaying channel 3 in one shot to being covered up with duct tape in the next. (00:01:50)
Continuity mistake: When Glenn Plummer gets the spiked baseball bat in the head, the camera shows two shots of the blood coming out of his head on the floor, and there's not much there. When the guy who killed him walks over to read the number on the back of his head, there is now a huge amount of blood, not enough time has passed in the 2 seconds since the previous shot for this to happen. (01:00:00)
Continuity mistake: When Emmanuelle Vaugier walks into the room with the clear box trap hanging from the ceiling, in the middle of the two hand openings is a syringe with the antidote. It is filled with significantly more in the close up shots, than there is in the full shots which show a lot less in the syringe. (01:06:00)
Continuity mistake: After seeing the Jigsaw piece cut in the man's body, after Mathews stands up, the position of his body changes slightly between several cuts. He goes from looking downwards, to looking off to the sides, etc. (00:07:50)
Continuity mistake: In the opening scene when the informant is about to cut into his eye they show a close up of the knife just centimeters away from his eye ball. There is minimal blood only in his eye but nowhere else, where in the cut before it the whole area around the eye is covered in blood. (00:03:30)
Continuity mistake: In the very beginning of Saw 2 when the informant awakes and realizes where he is and suddenly gets up from the chair there is a brief shot of him from the rear. If you look closely the leather waistband for the trap is completely loose, but when the camera quickly switches to his front, it shows the leather waist band tight around his waist. (00:01:20)
Continuity mistake: In the part right before the girl is thrown in the heroin needle pit, Jonas takes the envelope with the drug dealers tape. When the cop's son pulls the cover off the pit, you can see that the envelope that Jonas just ripped off is still on. It's right near the bottom of the screen, and in the middle. (00:49:30)
Continuity mistake: We figure out at some point or another in the movie that the people in the game are supposed to have numbers on their necks. (In the back of their minds). But in the scene where Amanda gets thrown in the needle pit Franky G's neck is seen as he walks past Glenn P. and as he walks out the door, with no numbers in either shot.
Continuity mistake: When Mathews and the female agent are talking about the first victim, Mathew's head changes position slightly as the camera cuts back and forth. It is leaning to the right in one shot, then to the left in the next, etc. Very subtle, but it's there. (00:07:00)
Continuity mistake: When we see the envelope with Obi's name on it, the position of the knife through the envelope changes three or four times. At one point it is by the "b" in Obi and in another it's above the "o". (00:34:25)
Continuity mistake: After Xavier kills Jonas with the spiked baseball bat, we see Amanda, Daniel, Addison and Laura in a hallway. Laura collapses to the ground due to the nerve gas that they've all been inhaling. Between shots her left arm moves from her stomach to across her right shoulder. (01:02:00)
Continuity mistake: The way Daniel holds the picture of him and his dad changes instantly. (01:01:25)
Continuity mistake: Eric sits down after finds out who is in the game with Daniel. When he does, the walkie-talkie on the desk simply disappears between different shots. (00:56:40)
Continuity mistake: In the office when Detective Matthews and Kerry are arguing, Matthews' gun keeps changing position on the desk with no-one touching it. (00:09:10)
Continuity mistake: At the end when Det Mathews is in the same room as Saw 1, you can see the mirrors on the wall. Both are intact, when one of them was broken by Daniel in the first movie.
Continuity mistake: After Xavier's had his throat cut, he grabs Daniel's shirt and his hand is completely covered in blood. The camera cuts away and then cuts back, and suddenly his hand is bone dry. (01:15:30)
Continuity mistake: When we see the SWAT team aim their lasers on Jigsaw, we see several dots. A few officers move and 2 remain. However we still see 5 or 6 dots. (00:15:00)
