I thought it was a set-up at the time, they knew it would come up, and were prepared. She was quick to stop Romney in his tracks, and whipped out the transcript as he spoke while at the same time obama was saying - Candy show the transcript. She held it up and then proceeded to lie with Obama saying at the same time - show it again Candy and at that time - Michelle started clapping.
Romney was railroaded for sure!
I should have added that when Michelle started clapping, the “undecideds” joined in...who chose the townhall people? Luntz would have done a much better job!