Trivia: Christian Bale nearly played George W. Bush in the Oliver Stone-directed film W, but left the project because he didn't like the prosthetics he had to wear.
Trivia: Lars requested (demanded) a "Mustang [Boss] 302" from the police to flee the bank robbery. Lars did not specify what year, but 1969-1972 and, possibly, 1973 are relevant to the August 23, 1973 real-life incident. The Mustang 302 was blue and it might seem easy to identify its shade, but that's not the case. Historically, there have been almost 900 colors for the Mustang's paint and there are a variety of blues. "Grabber Blue" was popular when the Mustang 302 emerged, as was "Acapulco Blue."
Trivia: There are several mid credit scenes in the film setting up characters for the follow up film, Rise of the Supermen. The first being the Superman Clone waking up and breaking out of Lex's lab, the second is John Henry Irons building his metal suit before taking up the mantle of Steel, the third is Superman's ship from when he was an infant flying to the north pole and creating the Fortress of Solitude with a mysterious figure dressed as Superman hovering before it, and the last being the Cyborg Superman flying towards the camera from space. (01:17:55 - 01:20:40)
Trivia: It might seem bizarre to make a movie about a 90-year-old drug mule (transporter), but "The Mule" is actually based on the true story of Leo Sharp who became known as the oldest drug mule in the U.S. Whereas Leo Sharp was a World War II veteran, Earl Stone in the movie was a Korean War veteran - and Clint Eastwood ("Earl") really did serve during the Korean War.
Trivia: The protagonist browses the archives of local newspapers to research more into the fire of May 3rd 2003. The news at the very top right of the front page, by the title "Town treasurer celebrates his re-election after disputed elections" features a mugshot of the director of the movie, Paul Feig. (01:20:25)
Trivia: The scene that takes place in the back yard is actually the same location that was used in the 2016 movie Fences. In fact, the fence in the scene is the same one that was built by Denzel Washington in that film. (00:17:10 - 00:21:40)
Trivia: Will Friedle of Boy Meets World fame wrote a script similar to this film and sold it to Disney around 1997. They opted not to make the film. By the time this film was made, there were so many story revisions that Friedle could not get a story credit. A representative from the Writer's Guild of America even tried to intervene on his behalf, but Disney's rep claimed his script was completely different.
Trivia: Even though Morgan Freeman is top billed, he has only six minutes of screen time.
Trivia: There's a running gag about Burt wearing a new hat, and how it throws everyone off. And it's true - this is the first film in the series where he isn't seen wearing an Atlanta Hawks hat at some point. (Instead he wears a Chicago Cubs hat). According to the documentary on the Blu-ray of the original Tremors, Burt wore an Atlanta Hawks hat in the first movie because the production had been given a large stock of them, and thus a Hawks hat became a staple of Burt's costume throughout the franchise. Michael Gross himself, however, is from Chicago, and in 2016, between the production of the 5th and 6th movies, the Cubs won the World Series (as mentioned in this film). Thus, Gross, a producer on the films, switched to the hat of his favorite team to honor the championship.
Trivia: The design of "The Auditor" is actually based on unused concept art for Pinhead for a "Hellraiser" reboot that was never produced. They simply removed the pins and added sunglasses to the character.
Trivia: At the very end Paul points at a guy on the street with his finger as a gun just like Charles Bronson did in the 1974 version.
Trivia: The setting is a little different (9-year-old Izzy is left alone at school), but "Home Alone" fans should recognize some parallel scenes. For example, the parents say, "We did it again" (forget to pick up Izzy after school) and run frantically through the halls; severe winter weather interferes with reaching Izzy; Izzy raids the refrigerator and pigs out on junk food; Izzy considers riding a skateboard down the steps, etc. Of course, there are stupid thieves who break into the school.
Trivia: The character of Kagan, the shaved head guy with the beard, is played by Jean-Claude Van Damme's son, Kris Van Damme.
Trivia: Although the post script states Dora Block was killed in the raid, she had been taken to hospital a few days earlier and wasn't present. She was murdered by the Ugandan Secret Police in reprisal a few days after the raid.
Trivia: An original plot had Laura attacking college freshmen during a game night for their part in her online humiliation and death.