I had a chance to see Tropic Thunder, and I have to say “it was the damn funniest movie I have seen in a long time.”
First off — the movie starts with a bunch of fake trailers that blend into the legit trailers. Great gag, and the audience was totally confused and didn’t get it for about 3 of the fake trailers. The premise of the movie (from Wikipedia) — Ben Stiller, Jack Black and Robert Downey Jr. are a group of prima donna actors filming a Vietnam War film when their fed-up writer and director decide to abandon them in the middle of the jungle, forcing them to fight their way out — is funny, but it is the actors who make the film. I would see the movie again just to watch Tom Cruise ‘negotiate’ with the group that takes Ben Stiller hostage.