I know it wasn't supernatural, but a few weeks ago I could have sworn I could hear my computer making noises in the middle of the night, when I knew for a fact it was in hibernation mode, and being a laptop, folded closed. I'm sure it was a dream, but the sounds sounded so real in my ears, I woke up and for some time I just lay there wondering "What the...?" It was kind of creepy because I was in bed, yet it was making noises as if I were on it. Was someone/something else on it??
When I got up the next morning, yup, there was my computer just where I left it, hibernating and folded up. It was still really weird though.