This was actually on Halloween morning one year. I lived in a small apartment with an open floor plan where you could see the entire apartment from the kitchen. I was in the kitchen packing my lunch to take to work when the TV turned on by itself, volume on full blast, to some static-y channel that kept cutting in and out. I was nowhere near the remote or the TV, and had no other people or animals living with me who could have done it accidentally. Probably not the scariest thing I've ever experienced (i'm sure there are many perfectly reasonable explanations as to how it happened), but it definitely freaked me out at the time! It had never happened before and hasn't since.