Because this is what we wanted, and this is what we're going to be getting from here on in.
I guess that we know now why Biden took the day off - but not what the method is that the Obama campaign is using to keep this from happening again. I'm personally guessing electroshock, but that's because I'm married to a mad scientist (well, mad engineer).
PS: Never mind Allahpundit's quibble. He's happiest when he can get a quibble in.