Did you know that in Iron Man?

Did you know that in Iron Man, in the scene where Pepper replaces the Arc reactor in Tony Stark's chest, the movie didn't have a big budget? Instead of using digital effects, a practical effect was used. They made a silicone replica of Robert Downey Jr.'s body, with a space for the Arc reactor. They even designed a chair to hide his body, leaving only his head visible. It was quite uncomfortable for the actor, but the final result turned out great.