Not quite on point, but I did witness an interesting event in Perth some years ago whilst awaiting my flight. I was standing watching a Jetstar flight having baggage offloaded. When the trolley's were full, as the driver took a left turn around the aircraft on the way to unloading, one of the bags fell off the trolley and landed on the tarmac. The driver was unaware and the baggage handlers who were by now loading baggage onto the aircraft for the next flight were also unaware. A short time later, another vehicle drove up and seeing the bag on the tarmac, putting 2 +2 together and arriving at a calculation of 5, took the bag to the handlers, who threw it onto the trolley with the other luggage. The flight was bound for Bali, and it would have been interesting to ascertain if the owner of the bag ever managed to have it located and returned to them.