A few years ago, when I was 15, my parents were out of town and I had to sleep at my grandparents' house. Before bed my grandmother told me to put the potted plant she had in front of the door to the room I was sleeping in. When I asked her why she told me that it was used to hold the door open. So I did what she asked.
Fast forward to about 30 minutes past midnight. I was sleeping and all of a sudden I heard the TV come on. When I opened my eyes everything was the opposite of how it was when I fell asleep. The door was closed and the potted plant was next to the bed, the ceiling fan that I turned on was now off, the TV was on with the volume on the max setting, and every light in the room was on.
Of course, as a 15 year old girl, I was freaked out and ran to my grandparents' room. I told them about what happened and my grandpa came back to the room with me to turn everything off. But when we arrived the potted plant was in front of the door, the TV was off, the ceiling fan was on, and the lights in the room were also off. I was so freaked out by this that I stayed up that entire night and never moved from the bed.
A few months after that, my cousin had to sleep at our grandparents' house. That night, around the same time as it happened to me, he woke up to everything opposite of how he left it. When he went to go to get my grandpa and come show him, everything was turned back the way it was. Neither I nor my cousin have stayed the night at my grandparents' house since then and still no one believes us.