I was using the drill press in our shop, key always goes in the chuck when you're done with it. I set the key on the bench while cleaning off the drill press table and it vanished, I looked everywhere it was gone. Not knowing anything about keys I bought another one but the pinion was too small so I made a bushing for it.
Fast forward a couple of years and I'm used the drill press again and set the key on the bench and there's two
, the old key reappeared. No one knew where it came from.
The bench next to the drill press is cleaned often because it's also the chopsaw bench so it always needs cleaning.