Over 50 years ago, when I was a grad student, I had an friend who was a professor of Astronomy. He went on sabbatical with his family to Australia for a year. One day I received a padded envelope from Australia from my friend. The envolope had nothing inside, but there was a note on the outside that was put on there by the US Postal Service that said that the contents had apparently pushed its way out of the package and was lost. However, if I could tell them what was in the package, they might be able to locate it and send it to me.
I remember thinking that it would be a fat chance that they could recover the item, but, first, I had to find out what was in the padded envelop. I wrote a letter to my friend telling him about the situation (there was no email in those days), A few weeks later I got a response that he had sent a boomerang for my young son. I filled out the Postal form and sent it in to them, not really expecting anything in return.
Wouldn't you know it, after a few weeks a got a package in the mail from the Post Office with a boomerang inside. Well, I was quite shocked, to tell you the truth. In all that bureaucracy of the Post Office they were able to sort it all out and locate this needle in a haystack. Not only that, it was a boomerang that went in one direction and ultimately ended up where it was supposed to go in yet another direction: the boomerang had boomeranged!