Not interesting, just stupid. My boat stuck in gear as I was trying to dock it, so I shut down the engine, jumped down and tried to fend off from the boat I was about to run into. Unfortunately, I misjudged my hand position by about an inch, which resulted in my losing the last joint of my little finger on my left hand...hence the moniker.
I do have a funny story that occurred later, however. Several years afterward, my wife chopped the tip of her finger off while splitting firewood. As we were walking to the car to head to the emergency room, she looked at me and said "You don't have any idea how much this hurts." I looked at her, then looked at my finger, then back at her. She said "Well, maybe you do. But it really hurts!" She was right, it really hurts.
JB