Departing from the South Lawn, Obama broke from tradition as he boarded Marine One, the presidential helicopter. He seemed to stun the Marine standing at attention by reaching out to shake his hand. The Marine obliged, shaking the president's hand before returning to a steady salute.The Marine responded correctly, avoiding making the Anointed One feel the idiot he was.
I'm not military, and even I know how to properly greet someone in the chain of command (uh, O-Man, you DO realize that you are the Commander-in-Chief, don't you? It isn't just a pretty title, it really means something).