In no particular order:
-- Atlanta Braves losing a heartbreaking game 7, 1-0 in ten innings, to the damn Twins in the 1991 World Series
-- Atlanta Braves winning the first two games of the 1996 World Series against the Yankees -- in New York -- and then losing four straight (including all three in Atlanta)
-- Bama losing to Auburn by one stinking point in 1982, my senior year at UA, and Bear's final game against Auburn
-- Being in the stands in South Bend to see 'Bama get absolutely dominated by Notre Dame, 37-6, in 1987
-- The loss to Auburn in 1997 when Ed Scissum fumbled and Auburn kicked a FG to win 18-17, and then we missed (barely, I recall) a very long FG attempt at the end
One memory that might have been my top worst moment when it happened is now a happy one. I was a huge Cub fan (having grown up in Chicago) and was distraught when the Cubs blew a 2-0 lead in the 1984 NLCS and lost 3 games to 2 to San Diego, when they were on the verge of their first World Series appearance in about 40 years. I now hate the Cubs, and wish that I'd hated them back in '84. At least I have the great memory of their 2003 flop against the Marlins!