Now this one is just silly, but I couldn't resist. Going through the attic recently I stumbled upon an old, old mantle clock that we used to put over the fire place every Christmas. It stopped working a long time ago. When I picked it up it made all kinds a little clunks and rattling sounds. I started wondering what it used to do on Christmas Eve when we were all asleep.
https://app.box.com/s/vmzyj7ryeczot1hb4of8qkz44of79phw