The Iron Man 2 panel was probably the most raucous at Comic Con, with fans going mental as they watched the first footage from the film and listened to the Q&A featuring director Jon Favreau, and stars Robert Downey Jr., Don Cheadle, Sam Rockwell and Scarlet Johansson. Click below to watch two video from the Q&A, where all sorts of interesting info was unveiled, such as the fact Mickey Rourke went to a Russian prison to research his role as Whiplash and what Johansson did to get the role as Black Widow.