Trivia: In the scene where Lenny is on the phone describing how Sammy Jenkis ends up in a home due to the death of his wife, it shows Sammy sitting in a chair looking towards the camera. Sammy is temporarily blocked from our view by someone walking in front of him. As the person passes by, it is not Sammy that re-appears, but Lenny. To see it well, you will have to use the frame-by-frame mode. There are about 5 visible frames of Lenny in the home, and then it cuts back to him inside the motel room talking on the phone again. (01:29:55)
Trivia: The Christmas ball scene is symbolic: since it is a masquerade party all the guests are in disguise. The only guests who aren't wearing masks are Bruce Wayne and Selina Kyle. This implies that their real personalities are Batman and Catwoman respectively, and that their public persona is the real disguise.
Trivia: For a single frame, one can see the structure that holds the Kong puppet. The first time it's still visible in modern copies at time code 00:52:36 (after the people run away on a log used as a bridge). The second one was digitally removed years ago, and it takes place when Kong exits the cave right after Ann faints. (00:52:36 - 01:05:30)
Trivia: Does anyone recognize the guy who was eaten by the T-Rex in San Diego? It was the screenwriter of Jurassic Park and The Lost World, David Koepp.
Trivia: In the scene where Alex approaches the two girls at the record stand you can see the original score for 2001: A Space Odyssey, also directed by Stanley Kubrick.
Trivia: Christian Bale dropped approximately 60 pounds for the role, going from 180 to 120, by eating a diet of one can of tuna and an apple a day for months. This is the most weight ever lost by an actor for a film role. Within 6 months of this film he then put on 100 pounds to play Batman in Batman Begins. He actually gained so much weight he was too big for the batsuit and had to drop 20lb for filming.
Trivia: Stan Lee, who co-created the Hulk, and Lou Ferrigno, who played him in the 70's TV show, have cameos as a pair of security guards in the beginning of the film. Ferrigno later made another cameo as a security guard in the 2008 reboot.
Trivia: Gene Barry and Ann Robinson, stars of the 1953 version of this movie, make a small cameo in this movie as Mary Ann's parents. They are at the end when the whole family is reunited.
Trivia: In "Split", James McAvoy was filming a scene with the multiple personalities talking amongst each other, and he punched a door that broke his knuckle. Atomic Blonde was filmed right after Split, which is why he has a cast on his arm as the director decided to work the real life injury into the film. McAvoy has said "It was fun actually, getting to use a plaster cast to smash people's faces."
Trivia: You can see Volterra's tower and the red-cloaked revelers from the festival of San Marco on the cover of Bella's copy of Romeo and Juliet when she wakes up in her bedroom. (Per director Chris Weitz.)
Trivia: At various points in the film, Jack Nicholson flicks his eyes to the camera, often only for a few frames, frequently hard to catch. It's deliberate - in one clip of behind the scenes footage Kubrick lies under him while setting up a scene, and specifically tells him to look down to the camera when filming. But there's no specific answer as to why - genre-defying, or to make the audience feel more threatened, or to make the viewers feel like the ghosts he sees. Hard to unsee though.
Trivia: When Mr. Jimmy is calling out names on the boat to see who's missing, the real Mr. Jimmy Harrell is standing next to him, wearing a dirty grey T-shirt (and presumably playing a random rig worker). You can first see him (from the back) when Russell calls out Caleb Holloway's name. The first view of his face is just as Russell gets out the life raft onto the deck of the rescue ship. (01:28:30)
Trivia: The two creepy girls from The Shining are in one of the various elevators.
Trivia: The infant playing Connie and Carlo's baby son Michael Francis Rizzi who Kay holds during the christening scene is Sofia Coppola, Francis Ford Coppola's daughter, who was born in May 1971. Sofia later had a prominent role in Part III as Michael's daughter, Mary. Other than the main characters, Sofia is the only actor to have appeared in all three films. In The Godfather II, she can be briefly seen as an immigrant girl on the ship that brings Vito Corleone to Ellis Island.
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."