Tropic Thunder unexpectedly lucked out by casting newly-minted A-list star Robert Downey Jr. as the third lead behind Ben Stiller and Jack Black. Looks like that luck is continuing now: the red-band (read: R-rated) trailer has been released and it has some priceless moments. Hilarious...and surprisingly gory, so don't say I didn't warn you. We don't see any of the Tom Cruise cameo, but at least that means they're not just giving away all the funny parts.

Follow this link to see the trailer (although be warned that you need iTunes in order to view it).