[mooby]

Since I'm a young gun there haven't been as many moments for me as some of the elders here but I can think of a few off the top of my head I'd tell my kid about when the time is right.

Manning/Brady aka Colts/Pats rivalry
Monday Night Miracle, with Sean Taylor's game clinching hit at the end still in vivid detail.
Tiger Woods, even though I'm still not much of a golf fan.
Alexander Ovechkin, even though where he stands amongst the legends of hockey still hasn't been noted mainly due to not enough seasons (aka i'll be telling my son, "back in my day before Ovie was finishing up his career, he scored goals like it was nothing. Check this youtube clip of the most amazing goal I've ever seen, it was against Phoenix way back in the day when his legend was just getting established. )

That's the ones for now.