Movie trailer for Robert Downey's blackface movie

Here's the trailer for the Ben Stiller, Jack Black and Robert Downey Jr. comedy "Tropic Thunder."

The film has generated a lot of controversy because Robert Downey plays a white man who plays a black man in a movie within a movie. God, those movie-within-a-movie movies can get so convoluted.

Watching the trailer, I couldn't help but cringe. Obviously I haven't seen the whole thing so I'll withhold my judgment but hang on to your seats folks. I have a feeling this is going to get ugly.