my son had a friend over one time and they were skate boarding in the shop, (only cement on the place), and the visiting kid used a 1/2" wrench to tighten a bolt on one of the trucks, and the kid threw the wrench when he was done with it I finally found it about 20 years later down behind some thing,
back in 1976 I hauled a load of scrap steel out to the farm to a pile we had, and my tow chain went missing, never had an idea what had happened to it, a few years ago, I let my son cleaned up the scrap pile, and sell the scrap, under the scrap I had placed in 76, was my tow chain, only took 30+ years to find it,