This 2008 comedy has an outrageous and potentially awkward, if not downright insensitive, premise: A group of actors filming a war movie in Vietnam, including one white actor playing a black soldier, cross the paths of drug traders in the remote Vietnamese jungle, and must fight for their survival for real. It’s the cleverness of the acting that carries off this film’s high-concept conceit: Ben Stiller (who also directed) and Jack Black are very funny and very good, and Robert Downey Jr. (pictured), as the actor actually risking and donning blackface to play his part, is delightful.