Got stuck in about 10 miles of bumper to bumper crawl on a high speed freeway a couple weeks ago so I passed the time looking at the debris on the shoulder as I inched by. Saw several phone cases, no phones, but did spot three different sockets in three different places, however they looked like small 3/8" drive and I was moving at the time, so I didn't stop. Lots of shoes, lawn chair debris, a few life jackets (I think they fly out of trailered boats), collision debris, and lots of general trash. It did help pass the time!
Found a Craftsman 10" locking 3/8 extension a few weeks ago, now in my box, couple years ago I found a Proto 3/8" torque wrench with a blowmold case, sold on eBay for about $50 as I have my own Snappys. Trailer hitch ball (hate to run over that!) was another find.
Dropped a crow's foot wrench into my '74 Jaguar XJ12L engine bay about 25 years ago, never did find it... Car is probably razor blades at this point, looooong gone.