I had sort of a "holy crap" moment just recently.
I was listening in on one older man talking at another. He was a cue collector, and he was talking about all sorts of big name historical cues that he owned, and how he'd actually been inside the shops of these cuemakers, way back in the day. Then he pulls out a "so what" vinyl soft case and from that, he produced an old cue that he said was from the '40s (I think- he mumbled a bit). It had no wrap, no wood handle- but where you held the cue, it was 10 thick graduated, tapered pieces of ivory, each about 1- 1.5 inches long. Strangest thing.
Then he says that he also has a collection of old maces, too. Wow! I really wanted to see a mace- he described them, their shape, uses, and their evolution to a cue, etc., to his friend, who really didn't seem to have much interest, but man, I was right there- interested eavesdropper! Never seen a mace in real life- only drawings and descriptions.
Anyway, that was more a holy crap moment, rather than a holy grail/ excalibur moment. And eavesdropping is often much more fun than direct conversation.