Trivia: Spoilers: There's a pretty subtle bit of foreshadowing in Gary's house. When he's seated and the group is playing Jenga, if you look behind Gary, there are two old-fashioned guns on the mantle. The way the shots of Gary are framed throughout the scene, both guns are pointed right at him several times. Later in the movie, Gary ends up being shot twice by two different guns - once by a gun loaded with blanks and once by a gun loaded with live ammunition.
Trivia: Not a mistake, just something that's not immediately obvious: When they arrive at the plane after the club scene, the man that walks them to the plane is Dan Aykroyd.
Trivia: The Pizza Planet truck, a fixture of nearly every full-length Pixar film, can be spotted in the Witch's Hut.
Trivia: During the Battle of Vulcan, as Sulu goes under a piece of another starship, you can see R2-D2 go flying past just over his shoulder. (00:47:35)
Trivia: Jimmy Buffet can be seen running back to get his margarita during the winged dinosaur attack on park visitors. (01:18:50)
Trivia: When Crichton talks to "Harvey" (Scorpius in his head) for the first time in the movie, Scorpius is dressed like Einstein. There is a blackboard with equations on it. One of them is "e = MC hammer". (00:21:30)
Trivia: The Cook County collector is played by Steven Spielberg.
Trivia: At the festival when the Green Goblin throws his grenades, before the shot of Parker, you see Stan Lee (creator of Spider-Man). He was supposed to pick up the little girl that he pushes to safety, but due to his age, after several takes he said if they wanted him to pick her up, they were going to be there all day. (01:04:10)
Trivia: Stan Lee makes his usual cameo as the guy that accidentally gets his car shrunk by Hope during the climactic chase. Sadly, this was the last Stan Lee cameo released before his death in November, 2018. (Although he had already filmed cameos for several other upcoming films before his death).
Trivia: For the shot where Hans Gruber falls from the top of the building, Alan Rickman was dropped by a stuntman from a 20-foot high model onto an air bag. To get the right reaction, the stunt man dropped Rickman on the count of two instead of three. Rickman said "That sounded like fun and so I decided to do it, I thought they were a bit surprised that I said I would and I was surrounded by people saying, 'You're mad, you're mad!' But no, it was fun. And it was the last shot, so if I'd broken my neck, they'd still have a movie."
Trivia: Garrett Morris makes a cameo as the man in the car when Scott hits its roof. Morris was the first person to portray Ant-Man in a 1979 sketch for Saturday Night Live called Superhero Party.
Trivia: The bear that Jack Ryan brings home to his daughter is the exact same bear Bruce Willis brings to his son in Die Hard (both films were directed by John McTiernan). (02:06:00)
Trivia: When Clark and Lois arrive at the diner, Superman I director (and part of II) Richard Donner is walking by. He was fired before filming ended and was replaced by Richard Lester, but his cameo made it to the final cut.