This happened to my sister when she was 14 and it still freaks both of us out almost 20 years later. In the house we lived in at the time there was a small bathroom with a shower in the garage that my sister used in the morning to get ready for school. There was also a toy chest out there that had some of my old toys ( I was around 10 or 11 at the time). One morning when my sister was taking a shower in the bathroom she heard a noise coming from the garage. She went out to investigate and saw that one of my toys was making the noises. It was a little rudolph mechanical reindeer toy that played the song and had a red light for a nose. That morning the toy was doing the song and the nose was blinking. She turned the toy over to turn it off ( the battery and switch were on the tummy of the toy) only to discover that not only was the battery case open but that there was no batteries inside of the case. when she saw this the toy all the sudden stopped making the noises and the nose stopped blinking. She freaked out and threw the toy back in the box and went in the house. From that day forward she never took a shower in that bathroom again. There was a bunch of other weird stuff that went on in that house but this was the most freaky.