One observer noted that during most of the debate, John Edwards looked like he had been slapped.
Edwards reacted like he was slapped most of the time, whereas Cheney was calm with every response...comfortable enough in some instances to not even offer a respond; kind of like a father who knows that words aren't necessary to explain to those around how off base the excitable child is.
"One observer noted that during most of the debate, John Edwards looked like he had been slapped."
Looked like he had been slapped, and was trying to laugh about it so maybe he wouldn't get slapped again.