Pedro beating Clemens 2-0 in Yankee Stadium. Great recap here:
sabr.org
It's one of the greatest pitching duels of all time, albeit a regular season one. But what makes think so fondly of it was what happened immediately afterward. As a Sox fan living in NYC in the pre-2004 era, when you went to a game in Yankee Stadium, you knew you were going to be subjected to "1918!" chants all game long.
So when, as we were leaving our seats in the bleachers, I heard this rumbling come from inside the stadium, I said to myself, "ah, crap, 1918." But no! As I entered the corridor, I realized that the chanting I'd heard was "PEDRO! PEDRO! PEDRO! PEDRO!" Every single Red Sox was jubilantly chanting it, fists pumping. And Pedro was so dominant that Yankee fans couldn't even say anything. (This was 4 years before the "Daddies" comment.) No trash talk at all; they just silently shuffled out.