Phonz pick 6 against MD to spark our rally! I was in attendance. I called it actually...it was the only possible play that was going to allow me to stay at the game. Pops had called it quits and was leaving had MD scored. It was also my birthday.
I think John Buck's dunk was against UVAgina.
Outside of the obvious ones mentioned already, my favorite play was Richard Belton's 2nd effort TD on 4th and Goal at UMD for the division in 2006. That was one of the few times I remember Grobe really going for the jugular.
Pro Football: Gibson knocking down Neil O'Donnell's pass in the end zone to send the Chargers to their only Super Bowl in my lifetime - 1994
Pro Basketball: Derek Fisher buzzer beater v Spurs with .4 seconds left. 2007
Pro Baseball: Tony Gwynn's HR in Game 1 vs Yankees in World Series to give Pads 4-2 lead. 1998
Golf: Payne Stewart winning US Open
College Football: Birg's TD Run vs State to seal game against #11 NC State and Philip Rivers. 2003
College Basketball: Chris Paul's buzzer beating floater @ State (nut punch game). Watching with 2 State fans. 2004
That .4 shot was in 2004.
Also if you're a Lakers fan, I don't know how you can put that shot over Horry's game winner against the Kings in 2002. Lakers didn't even win the championship in 04.