Trivia: When composer Éric Serra showed Inva Mula, the Albanian soprano who was going to sing the Diva Dance, the sheet music for that part, apparently she laughed and said that it was impossible for the human voice to switch from high to low notes that quickly. She got her way: The part that ended up in the film is not a single piece of audio, rather it's several pieces stitched meticulously together.
Trivia: Julie Delpy admitted that the only reason that she did this movie was because she needed to pay her rent.
Trivia: There have been rumors ever since the release of "Scream 2" that filmmaker Robert Rodriguez actually directed the scenes from the movie-within-the-movie "Stab." (This would explain why "Scream 4" states that Rodriguez directed "Stab.") However, there are also conflicting reports that director Wes Craven filmed the scenes for "Stab," and even some theories that both directors worked on the "Stab" scenes. To this day, the truth is unclear.
Trivia: Producers Gale Anne Hurd and Sam Mercer wanted to film the movie at the American Museum of Natural History in New York. However, the museum's administration was afraid that the film would not only cast the museum in an unflattering light, but it would also scare kids away from the museum. They were given permission by the Field Museum of Natural History in Chicago to film there, because they loved the movie's premise.
Trivia: In the Gattaca world, people like Vincent who fake their genetic profile are known as borrowed ladders. This is a reference to the double helix, or ladder shape, of DNA.
Trivia: During filming, George Clooney paid a visit to his friends on the set of "ER" wearing the batsuit.
Trivia: Sigourney Weaver actually makes the basketball shot. Even though the ball is out of shot for a second, she made the shot with no assistance. The shot cuts quickly because Ron Perlman dropped character in celebration, which can be seen in deleted scenes online.
Trivia: John Woo fought to keep the slash in the title, so moviegoers wouldn't think it was a film about hockey.
Trivia: One of the secretaries tells the president she can send a fax to the White House, and he replies something like: "If this works, I'll make you Postmaster General". In the closing credits, she's credited as "Future Postmaster General".
Trivia: At the end of the movie, the plane is crashing into the front of a casino. This building is actually The Sands hotel. The scene was done a few weeks/months before the hotel was demolished, this way the damages to the hotels entrance as the plane was launched into it didn't matter.
Trivia: Hammond doesn't appear in the second book (though he does in the second movie). This is because, in the book series, Hammond was killed in the first book. He slipped, broke his ankle and was fatally attacked by compies.
Trivia: At the dinner ceremony where Spawn attacks Wynn and kills Church, you can see a red-headed woman in a blue gown walking among the patrons in the beginning of the scene. The camera focuses on her briefly, but for a reason - look at her earrings. They are Spawn insignia. This is a reference to the angel Hellspawn hunter Angela, who wears those same insignia in the comics as trophies of her victories over previous Hellspawn. Very clever reference.
Trivia: The view that people acquired citizenship and the right to vote through military service reflected the views of "Starship Troopers" author Robert Heinlein. His views were influenced by his years in military service during World War II, and what he saw as the supposed "laziness" of civilians.
Trivia: In the last scene where Dunn, is watching the TV in the store window and he looks over and says to the guy standing next to him, "Hey, you look just like that guy", it is actually his stunt double.
Trivia: All the characters in the movie are named after famous prisons around the world - Holloway, Wren, Leavenworth, San Quentin, etc. The characters match the prison types too - Alderson never meets the group, and isolation is the major form of punishment at Alderson Prison in West Virginia. Dr. Holloway is a female doctor, and Holloway Prison is a women's prison in England, Kazan is autistic, and Kazan Prison is Russia is a "disorganized" prison, etc.
Trivia: After Teri Hatcher's character has been murdered, James Bond (Pierce Brosnan) shoots dead her killer (Vincent Schiavelli). When he does so, the expended bullet cartridge ejects very, very quickly and hits Brosnan squarely on the forehead.
Trivia: In the beginning of the movie, when Rayden 'shoots himself' against Kahn, he makes a strange cry, which is actually from the Mortal Kombat II games.
Trivia: The lava was primarily made of methylcellulose, the thickening agent used in fast-food milkshakes, and the ash was made mostly of ground newspaper.
Trivia: During the beginning of the film, Al Pacino and Keanu Reeves are on top of the office building. Pacino is promising money, clients, and power to Reeves if he joins his firm. This is a reference to the temptation of Christ where Satan took him to a mountain and showed him all the cities of the world and promised it to him if he bowed down to him.