Trivia: When James Brolin was offered the role of George Lutz, he was informed that they didn't have a script to give him. James bought a copy of the novel and began to read it. At two o'clock in the morning, while reading a very intense part of the book, a pair of pants that he had hung up earlier fell to the ground causing him to jump in fright. After that, James agreed to do the film.
Trivia: Writer Bruce Rubin's mother has a cameo in this movie. She portrays the nun who collapses after seeing how much money is on the check.
Trivia: In the film, the two transfer students are Kiriyama, the silent killer, and Kawada, the winner of a previous Battle Royale. In the original novel, only Kawada was the transfer student; Kiriyama was in the same class selected for this game of death. He was the main antagonist.
Trivia: Michael Myers' mask is a Captain Kirk mask painted white with ruffled hair and a few other tweaks.
Trivia: While giving a lecture at the Hollywood Scriptwriting Institute, director Joe Dante trash talked the novel "The Howling" on which the movie is based. One person in the audience raised his hand and asked, "So, you don't like the book, huh?" with Joe stating, "No, not really." The man responded that he was the one who wrote the novel. To Joe's surprise, the man in the audience was Gray Brandner, the author of "The Howling."
Trivia: When Donnie is about to enter the car with Gretchen near the end of the film, he clutches at his stomach as if in pain, and we see Frank touch his eye after Donnie dies. Both these moments foreshadow pain: a deleted scene of Donnie's death shows a pole impaling his stomach right where he clutched it. And Donnie shoots Frank in the eye.
Trivia: When Richie is watching YouTube, the video review he watches talking about "Stab 8" features a cameo from James A. Janisse and his wife Chelsea Rebecca. They are popular YouTubers who run various horror-themed shows on their channel "Dead Meat." As of 2022, they have over 5 million subscribers.
Trivia: The actor playing Adam is actually a co-writer of Saw. The film was shot in 18 days and for under a million dollars, and it all took place in 2 warehouses. The writers/directors wanted to make a movie about people trapped inside a single room.
Trivia: When the taxi Jessica and Eddie are in hits the lamppost, she spins around and her dress shifts position. For a couple of frames on the laserdisc version her underwear vanishes, or at least it appears to. Opinion is divided as to whether it's a deliberate move by the animators or just an error in colouring. (https://www.snopes.com/fact-check/who-stripped-jessica-rabbit/). (00:18:15)