Dan Asimov writes:

Just Friday I turned over an 8-inch rock from our garden0, and clinging to the bottom were two thin earthworms and a paperish thing that resembled the remains of some kind of cocoon. When that thing started flexing, I thought we were about to witness the emergence of some insect's next stage. But instead -- after about five minutes of flexing -- out walked a spider -- a black one quite fat (probably expecting) -- looking quite formidable.

I don't know if this was a "web" or not, but maybe not, given it was under a rock. Probably the spider was planning to go to sleep and wake up as one or more newborn spiders.

Cool. Thanks, Dan! Jim