"You, sir, are no Jack Kennedy." — U.S. Senator Lloyd Bentsen, Democratic vice-presidential candidate in 1988, to his opponent, Senator Dan Quayle, during a debate
The actual quotation of this retort by Bentsen is, "Senator, you're no Jack Kennedy."
"You, sir" makes you sound pretentious.
But, seriously.... Do not underestimate the powers of Mt. BB.