"You're in check."

A What did you just do?
B What? He's in check.
A Shut up!
B What???
A You actually said that to him? Out loud??
B Yeah, I thought he lost track ...
A That's Kramnik!
B Well uh... maybe... oh... OH!
A Shut up!
B Um yes, right. Doh!
A Now make a subtle face to let everyone know you realize your mistake.
B Absolutely.
A You just can't help youself some times, can you?
B No I guess not.
A Well keep shutting up!
B You got it!
- 1.5 seconds of dialog in my head after I advised the ex-World Champion