I'm guessing this is really an inside joke by the Nobel Committee. MAInfo posts the You Tube video and invites us to listen to the gasps of surprise from the crowd in the room when the announcement was made:
But when I watched this, I immediately caught the guy in back of the announcer who breaks out in a silly-assed grin (at :17 and :22) when Obama is said to be the winner in Norwegian (?) and then in English. It's just creepy.