UPDATE : As Biden finished his remarks and was shaking Obama's hand, ABC reports that he was heard on the microphone whispering, "This is a big fucking deal."
MSNBC has the video of the moment:
Mr. Vice President. That's an understatement.
Press Sec. Robert Gibbs tweeted:
Fox "news" is, of course, is hysterical.
Check this out (h/t Nico Pitney):
Think Progress FLASHBACK: Obama, 3 years ago: ‘I will judge my first term as president based on’ whether we delivered health care.