My four are (in no particular order):
John Norwood's HR that sends Vanderbilt to the National Championship.
Jay Cutler to Earl Bennett for the winning TD in Knoxville to end decades of misery playing the Vols.
Barry Gohen's three pointer to send the NCAA Tournament game with Pittsburgh into overtime.
Maria Bulanova going strike, strike, 8 pins in the 2018 Bowling National Championship against McKendree. Vanderbilt was down 3 games to 2 in the best of 7, and we were down going into the tenth frame, when Bulanova was money. It is without a doubt the most nerve wracking Vanderbilt sport I follow.