What is your best ""What a small world"" event?

My fiance babysat for his friend's daughter when she was little, and stayed in contact through Facebook after she grew up and he moved away. The girl is in college now and he hasn't really seen or spoken to her or her mother in years. Couple months ago, he and I are down at Epcot, and he swears he saw her, in a giant mob of her friends. I tried to get him to call out her name, but they were already gone by the time he was able to tell me. Well, he goes on Facebook when we get back. It was her. Ten years, almost no contact, halfway across the country, in huge mob of people at a fucking theme park.