By Leah Rozen Ryan Pienciak Natasha Stoynoff Jason Lynch
November 24, 2008 12:00 PM

It turns out Robert Downey Jr. wasn’t joking in Tropic Thunder—playing an Aussie Method actor who goes too far playing the part of a black GI in a Vietnam flick (right)—when he said, “I don’t drop character till I done a DVD commentary.” He does just that on the new Tropic DVD, channeling his character in the cast commentary. Whether ribbing his costars or talking about Downey’s upcoming Sherlock Holmes film (“Elementary, my dear Watson … don’t even trip on that”), it’s as hilarious as his Oscar-worthy turn in the movie. Don’t miss it.