There is a really great "documentary" about the upcoming film Tropic Thunder which will be released August 18th. It is titled Rain of Madness and here is the general synopsis:

"German born documentarian, Jan Jürgen blows the lid off Hollywood, exposing the frenzy, the insanity and the madness surrounding the filming of " Tropic Thunder". One of the most ambitious war films ever made."

The trailer can be seen full quality over at RainofMadness.com or below: