I was painting a room in an old mansion in my hometown. It was built in the beginning of the 19th century. I had a key to the house and was alone. I set my paint handycup down in the center of a desk behind me and was at least ten feet away from it when I heard a loud crash behind me. The cup had been thrown from the desk with such force that it sent paint almost all the way up the wall to the twelve foot ceiling. Really creeped me out. And it was a huge mess to clean up. I have no idea how it could’ve happened