Several
They say professionals forget about their losses, and always remember the wins....apparently I was never supposed to be a professional.
The first time I ever played in the Indiana State Pool Tournament, I broke and ran out (it was 8 ball). After making the 8, the guy stood up and said you didn't mark your pocket on the 8 you lose....
I went on to win the match, but in the town we came from IMO we had enough honor and class that we never enforced that rule. It was the rule, and the other guy was right, but IMO, I would hate to have to win like that. Lesson learned for me.
Second was probably the first time I went to a professional tournament in Olathe, Kansas. It was there that I watch a youngster of 19 or so, beat another guy from St. Louis out of $40K. I had never seen gambling like that on pool before. It got me hooked.
Third, the match between Efren Reyes and Jason Miller at the DCC finals. It was One Pocket, and Jason Miller that year was "killing" the field and was playing unbelievable.
That was before he played Efren. Efren beat him 3-0 in less than 45 minutes, in the most amazing display of one pocket and cue ball control. Easily the best pool match I have ever seen before or since. I immediately became an Efren fan.
Best of rolls to all,
Ken