Ben Stiller, Jack Black and Robert Downey Jr. lead the cast of Tropic Thunder, an action comedy about a group of self-absorbed actors who set out to make the most expensive war film in history After the excessive expenditure (and out of control egos of the pampered actors) threaten to end the movie, the frustrated director refuses to stop shooting, leading his cast deep into the jungles of Southeast Asia for "increased realism," there is meet by chance with some real fighters ...