TedStixon

Trivia: The "teeth pulling" trap is based on a trap from an early draft of "Saw IV." The lead character in the early draft (Detective Mathews from "Saw II", later replaced by Officer Rigg in the final draft) was forced to pull out all four wisdom teeth to find the code for a doorway. (As opposed to the two teeth Bobby must extract in this film.).

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Trivia: Spoilers. At one point, the two pig masks that assist Gordon were supposed to be Brad and Ryan from the opening public trap. This was related to the original ending, in which it is revealed that a number of the survivor's group members have been assisting John and Gordon with their work, behind the back of Hoffman. However, with this idea having been dropped, the identity of the two pig masks has now been left up to the imagination of the viewer. After the release of Jigsaw in 2017, it is revealed that John has another apprentice, Logan. Logan is of similar build to one of the pigmen and is quite possibly one of them.

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Trivia: The filmmakers had several times in the past tried to convince Cary Elwes to reprise his role as Dr. Gordon from the original film for previous entries. Elwes was finally persuaded when he realized this would be the final film, and that his character's return would be important to the story in the end.

TedStixon

Trivia: The scene involving the upturned lawnmowers is loosely based on a trap from an early draft of "Saw IV", in which a character is ground up by a giant lawnmower-like device described as a "human-blender."

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Trivia: The "Horsepower Trap" (the car trap involving Even and his friends) was an idea that writers Patrick Melton and Marcus Dunstan have tried to get into several "Saw" films before, only to be told by the producers that it was too gruesome and cruel. Knowing this was the intended final film, the producers finally allowed them to include the scene.

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Continuity mistake: As Evan is tearing himself away from the car seat, you can see his back muscles are a fleshy-color and only have a little bit of blood on them. When he crashes at the end of the scene, his back muscles are suddenly dark-red and saturated with blood, despite looking totally different just seconds before. (00:20:25)

TedStixon

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)

TedStixon