Okay, so I haven't actually seen Iron Man but this was on Videocopilot several loooooong months ago, back in 2009.
It's a very cool scene done by Robert Donnelly in response to a photoshopped picture a friend did.
As you can see the piece isn't that good, his thumb is in front of the bottle and the logo on his chest has the perspective all wrong.
Now check out the video. Huge improvement! :)
The Jager Bomber!! from Robert Donnelly on Vimeo.