LOL. Looks hilarious. I love it in the commercial when he's yelling "CUT!!! CUT!!!!"
http://www.tropicthunder.com/
http://www.imdb.com/title/tt0942385/
Oh and Robert Downey, Jr. is in "black face" to pretend he's a black actor. In the movie, the other black actor thinks he's really a fellow black actor.