"I work in an old building that was built in 1929. The space was closed for at least 20 years before we moved in because the previous owner had killed his wife, and then himself. We moved in two months ago and almost every day at exactly 12:08 p.m. the bell for the front door rings, but there's never anyone there. We've looked at the security recordings and everything, and there's never anyone there.
The other day I was alone in the office late in the evening. I was on my way out so I turned off all the lights, closed the windows, and activated the alarm. When I turned to close the door, the kitchen light was on (even though I had just turned it off). Another time, I arrived in the morning and the light in the main room turned itself off. I even heard the sound of the switch flipping. The last straw was when I saw my someone else's face next to mine in the reflection of my computer screen. There was no one there when I turned around.
I decided to talk about these things with the building manager's wife, who's lived in the building for several years. She assured me that it's actually pretty quiet in the building these days, and that there used to be a lot more strange occurrences, and at least now she can take the elevator by herself. I just laughed nervously."