Please proceed, Governor
When somebody thinks they're about to outsmart you and you encourage them to keep going, knowing you have a fact ready to completely humiliate them.
Example:
Mitt Romney: "You said in the Rose Garden the day after the attack, it was an act of terror... is that what you're saying?
Barack Obama: "Please proceed, Governor"
...
Romney humiliated by debate moderator
Mitt Romney: "You said in the Rose Garden the day after the attack, it was an act of terror... is that what you're saying?
Barack Obama: "Please proceed, Governor"
...
Romney humiliated by debate moderator