Continuity mistake: When we see Gibson looking at Jill in the interview room we see a tissue lay across Jill's bag. When he walks into the interview room the tissue is now stuck up. (00:11:00)
Continuity mistake: When Jill is running into the evidence room, the dead cop has got his trouser leg up revealing some skin. When Hoffman is locking Jill into the chair, look out the door and the trouser leg is down. (01:12:10 - 01:15:10)
Continuity mistake: When we see John getting his copy of Bobby's book signed, the way Bobby is holding the book changes depending on the angle. (00:42:30)
Continuity mistake: On the chat show, the host says, "Tell me about the actual experience". Just before this sentence, the camera does a quick cut and the host's hands switch places instantly. (00:13:40)
Continuity mistake: When on the chat show, Bobby says about the trap being "Something I never anticipated". When he does, Cale's hands move instantly. In one shot they are stretched out, in another they are not. (00:13:35)
Continuity mistake: When Jill notices the trike there is a shadow by the bike. When the angle changes, the shadow has gone. (00:16:40)
Continuity mistake: When Gibson is reviewing the Hoffman DVD, he says, "I recognise it". His hands move down his tie instantly. (00:44:00)
Continuity mistake: The blood around Bobby's face after he pulls his teeth keeps disappearing and reappearing when he's talking to Joyce. (01:08:50)
Continuity mistake: When Jill is in the police interview room, the key round her neck keeps moving position, as does the mug by her. (00:10:30)
Continuity mistake: When Gibson asks Jill if she knows who the man in the picture is, he is holding the picture in his left hand. When the camera cuts it is now in his right hand. He's also reaching between different bars. (00:48:40)
Continuity mistake: When Bobby is pulling teeth, he gets blood all down his shirt in one shot. Camera does an instant cut and the blood has disappeared. (00:59:20)
Continuity mistake: When Evan is thrown through the windshield of his car, all the glass is removed. When Homicide and IA are examining the car, half the windshield is back. (00:21:00 - 00:27:35)
Continuity mistake: When Bobby is first hearing from Billy The Puppet, his grip on his cage is constantly changing between camera cuts. (00:30:00)
Continuity mistake: After Bobby fails to save his publicist, he has a large amount of blood spatter from her on his shirt. In the next scene, however, there is a lot less blood on his shirt, and it's spatter-pattern isn't the same. (00:41:25)
Continuity mistake: Hoffman shoots the cop guarding Jill through the eye and some brain matter appears on the prison bars. Camera changes and the brain matter has disappeared. (01:11:20)
Continuity mistake: When Bobby gets the code for the last door from his teeth, the position of the teeth changes instantly. (01:01:50)
Continuity mistake: When Dr. Gordon looks down at his own severed foot at the end of the film it is laying on the outside of his foot, yet when the foot is seen in Saw 3 it is laying on the inside of the foot. (01:21:10)
Continuity mistake: We are shown Jill posting the video to Dr. Gordon. There is no writing on the envelope, however when it lands, same side up, there is. (01:18:20)
Continuity mistake: In the bar scene the amount of head on the beer and the level of beer changes in the glass without anyone touching it. (00:33:20)
Continuity mistake: In the garage trap there is one shot of the car that Evan crashes into and the windshield is intact. Yet in another angles just before Evans car crashes into it, the windscreen is smashed. (00:21:00)
Answer: Dr. Gordon from the 1st movie, and Ryan and Brad from the trap in the beginning of this movie.
derrick g