Trivia: In the opening scene, Mr. Newman told Max, "Please be nice to your sister. Help your mom, and do not touch the drone." During this 90-minute movie, Max's mom Amy says three words ("Winter is coming") and is on-screen less than 10 seconds. Max's sister (not named) does not appear at all. (00:02:03 - 01:02:28)
Trivia: After the Justice League go into the Stairportal, it cuts to giant words saying 5 Years Later. This is a joke and jab at the same kind of 5 years later cut in Avengers: Endgame.
Trivia: In the 2019 Adams Family Wednesday is older than Pugsley, but in the original, Pugsley is the oldest.
Trivia: To date the only "Men in Black" film not directed by Barry Sonnenfeld, and the only "Men in Black" movie not to feature Tommy Lee Jones and Will Smith. (Although a painting of Jones and Smith is visible in the film).
Trivia: The cuckoo bird was used at the beginning of the movie to point out what a parasitic bird does - secretly lays eggs in the nest of another bird species and leaves them for the different species to raise as their own. Another "brood parasite" that many people might be more familiar with is the Brown-headed cowbird. If all goes as intended, the different species, such as a Cardinal, will take care of the eggs until they hatch and continue feeding fledgings. Sometimes, "alien" eggs are evicted.
Trivia: After the police arrived, Hayley told Sarah, "It is not my fault my parents put a LoJack in my car." LoJack is a high-tech GPS system and theft recovery device that can pinpoint a car's exact location. LoJack ended sales in the U.S. in 2021 (will not accept any new orders but will continue to service existing connected vehicles). (00:41:50)
Trivia: The first "Critters" film to be rated R, as well as the first film in the series to not feature actors Don Keith Opper and Terrance Mann.
Trivia: When Kim throws a henchman over the railings onto Professor Dementor, the henchman lets out a Wilhelm scream.
Trivia: Stay for hilarious outtakes after the credits with Eryka Badhu giving psychic feedback.
Trivia: This film shares a lot of similarities with the 2007 film Superbad. In fact, Beanie Feldstein, who plays Molly, is the sister of Jonah Hill, who plays Seth in Superbad.