During his scripted speech, Obama claimed his position as "I have no more campaigns to run."
This prompted a round of applause from the Republican Congresscritters seemingly celebrating that Obama's unable to run for re-election.
Obama then ad-libbed "I know... because I won both of them."
Linkage to some Twitter reactions - usually the go-to source for the immediate OMG pulse of the moment - here and here and a few others if you look for them.
It was sweet.
If I ever have kids, I will tell them of this moment.