Is there a law .....?

It's in the same section that describes how a part dropped near a car will roll underneath to the center line.

I'd start looking under what ever is at the far end of the shop, or the smallest gap/nook/cranny anywhere in the potential flight path or anywhere in an "arc and slide" trajectory.

I once dropped a guitar pick (the only one I had on me), felt it hit the top of my shoe and then bounce.

I looked for an hour and moved literally everything in the room.

After driving home to get another one and back to play- at the end of the day when I removed my shoe...there it was.

It must have bounced straight up and came down in a perfectly vertical orientation to slip between my shoe and foot without me feeling it, and stayed right there, again without me feeling it.