As a young Journeyman in a construction union I had been waiting to finish my apprenticeship so I would be able to run my own jobs and in a way be my own boss but when I finally got the opportunity to work on a job by myself, I was wishing that I would have been working with someone else.
First off I was given a key to walk into my project that was located down a shady brick stairwell from the outside of the building. This stairwell led to a door that you most commonly see in old prohibition movies about Elliot Ness and the mob. Thinking nothing of it, excited to finally work alone I was shown my project and I worked my first day there aware that it was eerie inside of what is now a Children's Center but nothing happened.
The next day I went in to work earlier than I usually did so I could get a better idea of what kind of material I needed for the work week. I used my key and quickly turned the lights on. I walked down a brick hallway further into the basement. The whole area that was once a speakeasy had motion activated lights set up, again I didn't think anything of it. There was one dark room in the whole basement that didn't have any motion lights at all. When I reached the bottom of the stair well I peeked my head in the dark room and waived my arms thinking it would turn the lights on. At that moment a wooden chair slid across the floor. I remember the sound of it echoing as I started screaming and running in the other direction but I was the only one there.
Eventually I found the maintenance man and told him the story. He told me that he knew about the ghost he was the one that painted the religious picture down there and that one time he saw someone walking through the building when he was the only one there. He said "I don't mess with them and they don't mess with me"...