comes with someone reacting to something that someone else said, whether it be lloyd benson to dan quayle, whether it's george nod and smirk at al gore. it's obama's rejoinders to mccain and romney. this is his debate, and the other candidates will distinguish and define themselves by how they react to the situation as it unfolds live tonight. and they will react in the reflection of donald trump. it's just as simple as that. >> that's a great point about the reaction. we saw a couple -- of course, ronald reagan tilting his head, going there you go again, to jimmy carter. also, the moment where george w. bush did nothing but look at al gore who got in his face and kind of went like that and finished the answer and looked at him like, weirdo. back off. >> you talk about who needs to step up. who can? i don't see one who can step up and really kind of get out of the pack of ten, and none of them, except donald trump, can take this picture. that's actually important. thank you very much. michael duffy, thank you as well. we'll look for the new issue of "time" magazine on the surprising joy of virtual reality. ok