Hahaha! Hilarious!
All our chickens free range, but USUALLY they lay in the chicken house. Occasionally, however, they DO decide to run amok and lay eggs willy nilly in weird places. My kids are pretty good at finding the nests though, and once we take the eggs from the illegitimate nest, they decide that place is not safe anymore, and find a new place to hide them...

We also get eggs under our house, and I have NO CLUE how this happens. Our foundation is made from cinderblocks. There are vents, but they are all firmly in place and super small holes, tiny slits, so no way for a hen to get in there. There is a crawl space door also, a small thing, and it is also firmly screwed shut with no way in, no gaps.
Somehow though, every time my husband goes under there to fix or check something, sure enough, he finds a nest of eggs!

I think my hens can teleport...