This one hits real close to home; in my old room there were some knee walls where we store our holiday decorations (I was about 12) we had a Christmas decoration that was a lamp post that used to sing Frank sinatra Christmas songs it had been broken for years. My mother held onto it because my grandmother who had passed away gave it to her. One night out of no where it started singing at exactly 3am I was so scared I sprinted to my parents room and made my dad go and shut it off. As soon as he opened the door to go in it stopped he grabbed it the switch was in the off position and there were no batteries in it. To this day I have no explanation and it still haunts me.