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Donnie Wahlberg (who plays a major role in this film, as he has in the past two films) was not secure until 2 days before shooting began. It was suggested that his character be replaced by another character just in case, but director Darren Lynn Bousman persisted, and eventually secured Wahlberg. See more...

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Saw IV (2007) - 26 mistakes

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Genres: Crime, Horror, Thriller

Mistakes
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Updated this week Continuity: Rigg pulls the red scarf off the blonde woman and we don't see where it goes. Then there are two closeups of the woman where the scarf is nowhere in sight, and she has nothing on her left shoulder. Then in the next shot, suddenly the scarf is covering her and the machine behind her, and part of it is draped over her left shoulder.

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Updated this week Continuity: When the guy with the mouth stitched shut has put his legs against the machine to avoid being pulled anymore, a few seconds later you see him with his mouth open, enough for him to easily say something. At the end of the scene you see him being able to open his mouth easily, something he could've then done much earlier. And even if say his tongue was cut out to explain him not being able to say anything with an open mouth, he wouldn't be able to scream at the end either.

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Visible crew/equipment: Several times in the movie you can see a stunt double for Donnie Wahlberg, like when he tries to hang himself. Art runs over and there is a wide shot focusing on both of them. No slo-mo required, but you can see it's a stunt double.

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Continuity: The blood stain on Riggs' white shirt around the neck has blood under the collar, then at the end it is over the collar and has increased in amount.

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Continuity: When Agent Strahm has finally realised where the final game is being played, he holds up the piece of paper of Jigsaw and Art outside the Gideon building. There is a hand at the top of the picture, which is a newspaper clipping, but he is holding a picture, not a newspaper. This is a reused shot of when he shows Agent Perez the picture earlier in the movie.

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Deliberate "mistake": When Agent Hoffman writes the letter to Amanda, he puts the envelope so her name is pointing down, yet when Amanda opens the drawer her name is at the top. The director had to do this or it would have revealed Hoffman was the new apprentice all along.

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Other: In Saw II, Jigsaw shares a story with Detective Matthews about how he attempted suicide after his cancer diagnosis by driving his car off a cliff. We then see Jigsaw pulling a metal rod out of the left side of his stomach. However, no puncture wound/scarring is visible on Jigsaw's stomach when his autopsy is being performed.

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Continuity: When Strahm is interviewing Jill Tuck, he rolls his sleeves up and his left sleeve goes over his elbow. Camera cuts and it's now below his elbow.

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Continuity: During the autopsy scene, Dr Hefner puts his mask on upside down(the eye lenses are on his neck) when he turns to begin, the mask is on correctly.

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Revealing: When Rigg shoots Art, just before that you can see Art shouting. Look at his chest. The bullet wound is already there (no slow-mo needed).

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Visible crew/equipment: As Jill is being interrogated, when it cuts to a shot where the two cops are looking at her through two way glass, a camera man is visible between them and the boom mic in seen at the top left hand corner, very faintly.

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Continuity: When Rigg pulls the last spike out of Morgan in the school room, the shot cuts away, when it comes back you see the spike is still in her.

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Continuity: When Rigg puts on his white shirt, there is a wet patch that appears and disappears while Billy is talking on the TV.

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Continuity: When Strahm is interviewing Jill Tuck about the phrase "Cherish Your Life," the stirrer in Jill's coffee keeps changing position.

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Visible crew/equipment: When Hoffman is talking to Rigg about it ending here, he walks in front of the camera. When he does, some of the filming equipment's shadow can be seen on Hoffman.

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Factual error: Several mistakes about the clock in Jigsaw's workshop: around 300 years ago the first pendulum clocks were built. They were completely different by size and design than this one, so the claim that it is so old is completely wrong. Real pendulum clocks like the one seen in the movie never have a second hand from center. You can also see by the movement of the second hand that it is a modern, battery operated quartz movement. This also means that the ticking you hear is not created by the clock itself but was added later.

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Revealing: When Cecil's face is being cut by the Knife-chair, the first time he comes into the blades, it is painfully obvious that the blood is being pumped through the knives, and that his face is not being cut. You can even see his bloody, yet cut-free, face almost come through the knives for at least two full seconds, before there is a flash-frame jump-cut, and a number of deep cuts magically appear on his face.

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Revealing: When Art is hitting the Trevor (the blinded man) character with the hammer/hatchet in the beginning, if you look closely, you can see blood coming from Trevor's head, yet there is no wound or cut. The blood is actually coming from the prop that is hitting him in the head.

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Continuity: When Rig opens the door the clock says 00:00 time left, but when he is talking to Art on the floor the clock says 00:01.

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Continuity: When Jill went to get Cecil's jacket, she didn't lock the door behind her, yet, when Cecil forced himself in, he had to unlock the door to get into the same room his jacket was in.

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