Trivia: The first alien in the mail room that Will Smith starts to talk to in alien language is a rapper known in real life as Biz Markie. He is really making those noises with his mouth. (00:28:35)
Trivia: When Box is watching TV and is beeped to go to work, he is actually watching an episode of the original S.W.A.T. TV series.
Trivia: The topless girl at the mobsters' pool party is future "Three's Company" TV star Suzanne Somers.
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: Some of the members of Captain America's wartime elite squad are taken from Marvel Comics WWII based "Sgt Nick Fury and the Howling Commandos" - such as Dum Dum Duggan and Gabe Jones.
Trivia: The dolphin was trained to retrieve many objects that were thrown in a pool at SeaWorld Miami. There were maybe 12 -16 different shaped and weighted items that she learned to pick up and place on the side out of the pool and water. One of the objects and the most important was a black rubber gun. Every single time the only object she would not recover was the gun.
Trivia: Barney asks Drummer where Church is and Drummer replies "forget about him, he's out of the picture." A reference to Bruce Willis wanting too much money for his part in the film, hence he was cut out of the picture.
Trivia: Original Dukes of Hazzard stars John Schneider, Tom Wopat and Catherine Bach were offered cameos in the movie. All three refused as they hated the screenplay.
Trivia: SPOILER: At the end on Nick Fury's gravestone, under his name is the passage from Ezekiel 25:17: "The path of the righteous man is beset..." This was the start of a big monologue made famous by Samuel L Jackson in Pulp Fiction. (01:59:25)
Trivia: During the scene before the fight, where Rocky enters the ring and sees the 2 portraits of him and Apollo, the error on Rocky's shorts was an actual error made by the art crew, and Sylvester Stallone rewrote the scene when he saw this mistake.
Trivia: The only combatant to get a Flawless Victory was Johnny Cage when he fought Goro. A Flawless Victory is achieved when a combatant takes no damage from their opponent.
Trivia: Minor Spoilers: Director David Leitch previously made "Deadpool 2," which starred Ryan Reynolds, and in which Brad Pitt had a brief, blink-and-you'll-miss-it 2-second cameo. Leitch also directed this film, which stars Brad Pitt, and in which Ryan Reynolds has a brief, blink-and-you'll-miss-it 2-second cameo. (Reynolds appears very briefly in a flashback as the assassin Pitt is subbing for).
Trivia: Anthony Daniels once again portrays C-3PO, making him the only actor to appear in every Star Wars film to this point. He also plays C-3PO for a brief cameo in Rogue One.