I posted a while back about losing a medium sized hand quilting hoop, it eventually turned up in the attic . I KNOW I did not put it up there and no one else in the house could have.
Now DH has lost one of his small piece cutting patterns, a triangle made of metal. He knew exactly where it fell, down the side of the sleep sofa . We turned it upside down, took everything out, shook everything out. It is GONE. The first few times it fell down there it just landed on the rug. This time it took a trip into the twilight zone.