DreamWorks has uploaded a companion piece to Tropic Thunder on iTunes that chronicles the fictitious cast and crew's struggle to film the movie with the movie in Paramount-DreamWorks' recent action comedy release.

The mockumentary Rain Of Madness stars Jay Baruchel, Jack Black, Steve Coogan, Robert Downey Jr, Bill Hader, Nick Nolte and Ben Stiller and was shot on location in Hawaii at the same locations used in the main feature.

'It's pretty straightforward,' Tropic Thunder director and star Ben Stiller said. 'Original material for web consumption is a growing area for us, and Rain Of Madness dovetails perfectly with the theatrical release of Tropic Thunder.'

Since going on release on August 13, Tropic Thunder has grossed more than $69.5m in North America and more than $79.1m worldwide.