This is a good story. In one of the Democratic debates, Bill Richardson and Obama were talking while the moderator interacted with another candidate. If you've ever been in a classroom and not paid attention, you can identify with Richardson as he describes what happened next:
"As I'm chatting with Obama, the moderator says, 'Governor Richardson, what do you think of that?' And I look at him like a deer in the headlights. I was about to say that I hadn't heard, when Obama puts his hand over his mouth and says, 'Katrina.' So I gave my four-point plan on Katrina. When I was done and the debate moved on, I looked over and said, 'Thanks, you're okay.' He said, 'Nothing to it, brother.'"