After sitting on a bench putting my camera and lens together a young man approached and offered me a lens cap he had found some days before. He recognised my lens as being one that it would fit. He chatted to me for a while and then he left and ran down the jetty towards the water a little too fast for my liking but he did just stop short of jumping into the water when he heard me call out to him "STOP". That is the reason I ended up with a blurred image. He turned around and came back and talked to me for a while before he left. I don't know to this day if he was about to jump and I still think about that young man every time I use the lens cap and wonder whatever happened to him.
Most definitely this is all true.