I'm a treasure hunter by trade. I normally hunt shipwrecks of the early colonial period. Back when I was 19, I was with my dad hunting shipwrecks in the Caribbean. As we ventured into international waters, we got into an argument, so I left the boat to go diving, just to get away from the pressure. It was while spearfishing that I lost my sling, and it landed on a metal boat below me. I swam down and when I saw it, I went: Oh my god, what the heck is that? I'd never seen anything that large before. It...