New story (this time a true story) at Knowing she would:
"When we moved into the little flat, we had this joke: there’s a ghost floor. A bit a la Hogwarts, you know. Sometimes you’d pass the second floor and find your self in it again. Just sometimes. That was funny. Ha ha. We always agreed on when this would happen, we were probably just more tired than usual. Ha ha."
Image from here.