No one realised it at the time, but 2008's Iron Man was a historic moment in the history of cinema. Had it flopped, that would have probably been the last anyone had heard of Iron Man, while a movie starring The Avengers would have likely remained no more than a dream for fans. Things worked out a little differently though, and Iron Man earned nearly $600 million worldwide. The Incredible Hulk wasn't quite as successful, but Marvel realised they had a winner on their hands with Iron Man, and the sequel - which wasn't quite so well-received - was also a hit. As a result, the stage was set for Earth's Mightiest Heroes to assemble. Directed by Jon Favreau and starring Robert Downey Jr., Iron Man turned the Stan Lee creation from a C-List hero into a household name, and Tony Stark has since become the face of the Marvel Universe both in regards to the movies and comics. However, the production didn't go quite as smoothly as you might expect, and things could have gone very differently for the Armoured Avenger had Marvel not had a lot of luck on their side. Here, you will find ten things you never knew about Iron Man. From who was really responsible for that after-credits scene to original casting choices, the chaos which comes from working without a script, a cameo you definitely missed, and some surprising plans for a crossover with Spider-Man 2, these will no doubt change how you look at the movie...