That was the implied sound effect Tuesday night as Sen. Rand Paul casually corrected Donald Trump on China’s participation in the Trans-Pacific Partnership, the sweeping trade deal among the U.S. and 11 other countries. Trump had been on a tear, railing at how the deal was “a disaster” and saying China was the “No. 1 abuser” of the U.S. Paul waited a beat to interject.

“Hey, Gerard,” he said, addressing moderator Gerard Baker, editor in chief of the Wall Street Journal. “You know, we might want to point out that China’s not part of this deal.”

He shrugged casually as the audience laughed.