I have a friend who lived in an old house in Waterloo. One day she was home alone, carrying a pitcher of water in the kitchen. She felt someone/something grab her jacket and yank her back so hard that she fell on the floor and the pitcher fell, water everywhere, etc. There was no-one there. When she told me, she asked if I believed in ghosts. Now, she was a psychologist, with a Ph.D. I asked her if she had told her supervisor, wondering how he would respond to that news. She said that he was ok with it. (It’s a risk to tell something like that to your clinical supervisor!)
She said after that, that various things happened. Never when anyone else was at home. When she became pregnant, she refused to remain in that house. She felt that the baby was at risk because of what was happening.