A man had been in his new inner city apartment on the 10th floor for just under six months. And every morning brought the same unsettling experience.

He lay in bed staring at the alarm clock. It was 5:17am. It was late this morning. Then it happened. “Thump, thump.” A pause, and then it happened again. He knew what would come next. A high pitched keening, then the sound of gnashing and grinding teeth, followed by a…