One morning when I was passing the drain, I heard some screaming. I was tempted to go in so I did. As I entered I heard a few rats. It looked like there would never be a dead end. Just before I was going to turn around and go back, I heard another scream. It came down the drainpipe. I walked over to the pipe and looked in. There was nothing there. At the entrance I heard somebody talking “We’ll close it down now.” I quickly ran to the entrance and exited the drain. It was never known what the scream was.