Take a good look at that Tropic Thunder poster. Go past the glossy, airbrushed photos of the film's many stars, past the lush jungle setting, past the fiery explosions, and you might notice something. See there? Down at the bottom? It says "Screenplay by Ben Stiller & Justin Theroux, and Etan Cohen." Sure, other more "legitimate" media outlets may give all the ink to those first two dudes, but here at Defamer we like to dig a little deeper. Just who is this Etan Cohen fellow and how did he get roped in to working on the biggest comedy of the summer? Stick around after the jump to hear one of Hollywood's newest writing stars dish the dirt about meeting Tom Cruise for the first time, what it feels like to suddenly have people kissing your ass, and why you shouldn't be offended by all that Simple Jack stuff.