Trivia: Notice they don't play the lyrics with the "Iron Man" song in the closing credits. That's because the Black Sabbath song was not about the comic book Iron Man. There are many theories about what the song means, but the most popular is that it is about a man who travels to the future and sees the apocalypse. They couldn't use the lyrics to describe the Iron Man in the movie: He was turned to steel - In the great magnetic field - Where he traveled time - For the future of mankind. Now the time is here - For Iron Man to spread fear - Vengeance from the grave - Kills the people he once saved.
Trivia: The first terrorist to be killed by Iron Man is none other than Tom Morello, guitarist of Rage Against the Machine and Audioslave. Audioslave's song "Cochise" was used in previews.
Trivia: The lead terrorist gives a speech about Genghis Khan's use of the bow and arrow. Iron Man's archenemy in the comics, The Mandarin, claims to be a direct descendant of Genghis Khan.
Trivia: The movie has some interesting hidden promises: Downey will appear in The Incredible Hulk (again as Iron Man), while at this movie's conclusion, the Avengers are mentioned. Thus, whereas the previous Marvel features (X-Men, Daredevil, Spiderman) are as yet essentially stand-alones, the Iron Man movie initiates the first character cross-overs in the Marvel Comics movie conversions.
Trivia: The theme song from the Iron Man (1966) cartoon series is played in several shots. In the casino scene, in Stark's bedroom scene, and finally it is the personalized ring tone for Stark on James Rhodes cell phone.
Trivia: In the movie, Jarvis is Tony's automated system. In the comics, Jarvis is the name of his butler, who later becomes the butler for the Avengers.
Trivia: The name of the terrorist group that abducts Tony, "The Ten Rings," is a reference to an infamous Iron Man villain, "The Mandarin," who possessed 10 magical rings.
Trivia: When Pepper Potts is stealing Obediah's files off of Tony Starks computer in his office, pay close attention to some of the names of the files. On several files that show on the computer screen, a few are labeled "Lebowski". A playful homage to Jeff Bridges (who plays Obediah) and his famous slacker character from the movie of the same name.
Trivia: While on the plane, there is a video featuring Ghostface Killah (of the Wu-Tang Clan), whose alias is Tony Stark.
Trivia: Stan Lee makes his usual cameo, this time seen as a man who Tony Stark mistakes as Hugh Hefner.
Trivia: In the scene where Col. James Rhodes briefs the media about the "training exercise" incident, if you look at the microphones at the podium, you can see three from left to right, 10 News, 19 KJFM and 6 KPGB. The first two are facing flat revealing the numbers 10 and 19, and the 3rd is at an angle so you can see the 6 twice, making, 10-19-66 or October 19, 1966, the director Jon Favreau's birthday.
Trivia: The reason Starke's friend Rhodes looks at the suit of armor at the end of the movie and says something like "Next Time!" is because in the comic books he ends up actually having his own suit of armor, donning the name War Machine. He backs Tony Stark up in many situations and is one of his most trusted friends.
Trivia: After Tony's press conference about stopping Stark Industries weapons manufacturing, Obidiah Stane uses the phrase "Iron Monger". This is the name given to his character in the comics, when he dons the suit seen at the end of the movie.
Trivia: Near the end of the movie, Stark's alibi from the SHIELD agent calls Iron Man Stark's bodyguard. In the early comics the public believed Iron Man was Stark's bodyguard.
Trivia: During the first part of the end credits we see a simple animation that eventually resolves itself into the symbol of SHIELD. Part of this animation shows not the Iron Man, but the War Machine armor (note the shoulder-mounted external machine gun, for example) that Tony Stark constructed for James Rhodes in the comic book. This is the second hint in the movie at Rhodes becoming War Machine in the future (the first being Rhodes glancing at an unfinished armor and saying, "Next time").
Trivia: Tony Stark's final line in the film is, "I am Iron Man." This is the opening line to the song "Iron Man" by Black Sabbath, which immediately follows. It is mentioned in the novelization that this was intentional, as "Iron Man" was one of Stark's favorite songs.