Trivia: In the original script, after making it to the docks, a dog would appear and start barking at Jason prompting Jason to kick it. Kane Hodder refused and even stated that as evil as Jason was, he'd never hurt an animal, so the scene was dropped.
Trivia: The profuse drooling that Wallace suffers once he has been "transformed" into the walrus could not be helped - actor Justin Long was constantly drooling due to the heavy prosthetic makeup, and the fact he had to hold his tongue back to simulate the fact that his character's tongue had been cut out.
Trivia: The directorial debut of series co-star Patrick Wilson.
Trivia: At one point early in production, the film was going to be slightly retooled in order to make it the third entry in the "Cloverfield" franchise, following "Cloverfield" and "10 Cloverfield Lane." Eventually, this idea was dropped, and the movie was left as a stand-alone film.
Trivia: Probably the most impressive visual effect in this film is when Corso consults the twin brothers Pablo and Pedro Ceniza (rare book experts). Both Ceniza twins were played by actor José López Rodero in the subtle and entirely convincing digital effect sequence. The only flaw was that the elderly twins had identical facial wrinkles, which never happens with real-life twins. Beyond that, José López Rodero additionally played the two nameless workmen that Corso encounters at the end of the film, meaning that Rodero played four digital-effect roles in this movie.
Trivia: When the kids are walking down the stairs in the subway station, you can see one guy walking upstairs dressed as the character Mojo Jojo from "The Powerpuff Girls." Mojo Jojo was voiced by Roger L. Jackson, the same voice actor for Ghostface.
Trivia: When Lorraine Warren is dreaming about the demonic nun in her house, the demon actually reveals its name in 2 ways. The first is the way Lorraine realises at the end of the movie (written in the Bible). However, the audience is another way-the gold letters on the bookshelf behind her also spell out the name "Valak."
Trivia: In the end scene (right before the lead characters go into the cafe shop) you can see a bus drive past with the number 180 printed across the top. The number 180 was a significant number in the first three Final Destination films.
Trivia: The spears shown in the lab are from Predator 2 and Alien vs Predator.
Trivia: Jimmy didn't die even though it never shows him after he faints on the steering wheel in the car with Lori. He simply passed out. The television cut shows him alive in the ambulance at the end, but for some reason in the theatrical version, they left it out for us to 'wonder'.
Trivia: For the scene in which Jonathan drives a stake into Lucy's heart, Steven Weber's reactions to getting doused in blood are real. For this particular sequence, Mel Brooks did not tell him what was going to happen.
Trivia: In the scene where the judge is killed by the two sentries, one of the sentries is played by director Sam Raimi (of Spider-man fame).
Trivia: Like Tanedra Howard won a role in Saw 6, Gabby West won the second season of Scream Queens and is featured in this film. She is Kara, Evan's girlfriend. She is underneath one of the rear wheels of the car in the garage trap.
Trivia: When Billy's mom takes the picture of Gizmo at the beginning, Gizmo becomes frightened and runs over to Mr. Peltzer. When the scene is slowed, you can see the puppeteer's hand underneath while operating the Gizmo doll. Not a mistake as needs slo-mo, but worth a look. (00:19:10)
Trivia: At the very end of the movie when the new kids are telling the story, they make a sarcastic comment about the killer being the girl from the Noxzema commercials. The girl who played the killer, Rebecca Gayheart, really was the girl from the Noxzema commercials.
Trivia: When Van Helsing is fighting Dracula towards the end as a werewolf, he stops to get out his claws. This is an obvious reference to Wolverine, whom Hugh Jackman played in both "X-Men" movies.
Trivia: Mr. Tuttle is also the name of the housekeeper from another haunted-house movie, "The Changeling" (1960).
Trivia: In the hospital Heather is told that she can not be in a certain area without a pass; she replies "Screw your pass." The very same line was spoken, by her character Nancy in Nightmare on Elm Street 1, to a hall monitor in her dream.