My 13-year-old son was spending the summer at a friend's resort in northern MN. We resided in Sioux City, IA. My son acted as a fishing guide for a man from central Iowa. On the day this guy was leaving the resort, settling up his bill, etc., he asked my son if he knew anyone in South Sioux City, NE (across the river). My son answered "yes" and the guy asked if he knew __________ who happened to be my son's great uncle. The two had served together in the Navy in WWII.
The best part....I had always told my son my "small world stories" and he was so excited to call and tell me his.