I just went in the garage to turn on the dryer. When the clothes started tumbling, something started playing "We Wish you a Merry Christmas" in the dryer. I opened the door and it stopped; closed it and it started again. So I stopped it, took everything out, checked pockets. Nothing. Started it up again, and the music started again. It sounds like one of those greeting cards you open up and music plays. After a while it stopped.
Don't laugh. It happened. I don't know. Maybe I need to go back to bed.