My worst memory was riding down to the port on my bicycle only to find on arrival that my pannier bag had fallen off which contained my camera , phone and wallet somewhere on the 15km trip.I rode back the same way and found it 6km down the road , someone had picked it up and placed it on a fence with camera and phone ,wallet still in it so thanks to that person who ever they are.
Glad to hear that the bicycle is not only a Dutch way of shipspotting. I lost a bag and a glove once (Separate occasions) and indeed found them back the next day or so, hanging from or laying on a pole. I did find a lens cover once, and kept it....The worst experiences are two or three flat tires on the bike, one caused by a fishing hook that was left behind by a fisherman on the cycle path. Walking home was on average about 7-8 kilometers.