I know exactly what my Hot Tub Time Machine moment is. The KC Royals at one time used to have lots of open try outs all over the country. Back then I was about 20 years old and had a 90+ mph fastball. I didn't go to the try out. At the time I wasn't happy with my curve ball (I over threw it badly), but had a really good knuckle ball. I was such an idiot that I thought that stuff like that would matter. I-jet.
Don't get me started with HTTM moments vis-a-vis women. That could fill an encyclopedia. Lucky for me the one I liked the best is my wife.