Saw IV

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. (00:38:40)

Factual error: It would not be possible for the scalping device to scalp Brenda's hair in the manner that it does. Hair is too thin to withstand that much pressure when being pulled and would rip long before she began to bleed profusely. At worst, she would likely be bleeding a little bit in a non-fatal manner from having her hair yanked after it ripped.

Movielover1996

Continuity mistake: 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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Jigsaw: "Cherish your life" is the motto this whole organization is built on. Cherish your life... your life.

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Trivia: The footage in the beginning of the movie that shows Jigsaw swallowing the wax-covered cassette was actually shot during production of "Saw III", but was not used in the final cut.

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Question: A glass casket with a key inside it is shown in John's warehouse. What does that mean?

Answer: It plays an important role in the next few movies.

Answer: This was revealed by director Darren Bousman to have originally been used in a now-deleted (and not released as of Oct. 2020) scene in the movie. The glass box is used for what is (most likely) a different purpose in Saw V.

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