Considering how the trailer for Oliver Stone's W. focused rather heavily on James Cromwell and Louis Armstrong, we're happy to bring you this new behind-the-scenes clip (courtesy of Access Hollywood), which offers the first extended glimpse of Josh Brolin doing his best impression of The Decider. It's the impersonation that's split the Defamer offices in half, with some calling it uncannily accurate (and uncomfortably erotic), and others finding Brolin miscast and not ready for prime time. We'll let you (and Elisabeth Hasselbeck!) be the judge, though keep in mind this is all B-roll; once Oliver Stone finally makes use of that green screen to take Bush on a kaleidoscopic journey through the jungles of Vietnam to the tune of "Riders on the Storm," perhaps we'll have the context we need to truly appreciate Brolin's performance. Catch the performance in all its glory after the jump.Click to view