Mine was sometime around 2011 or so. I was sifting the creek for fossils (mostly shark teeth, there were so many it was insane), and I noticed that a woman was watching me. She started to ask me questions about what I was doing that got more and more specific that I felt like I was taking a biology exam. One example question was, "What species of shark is that one?" "Isurus hastalis." "How can you tell the difference between those two?". "Oh, this one is the same shape as the Great White, but doesn't have serrations." There were plenty more questions, but it was actually fun answering, since I knew it. She then asked if I was interested in shipwrecks, and I told her they were my favorite, and that I grew up at the Graveyard of the Atlantic. She invited me on to go dive and work on the Queen Anne's Revenge, but it was a ways from home and on a volunteer basis, and being newly married it was the first summer I absolutely needed to make money, so I politely declined. Still haunts me, that's my favorite ship in the world, captained by one of my most interesting historical persons. It's funny too, because I had a teacher previously who did sluice work on it who I had spoken to often about the subject.