One evening, I took the train with a friend for the first time. It was the middle of winter, so the sun went down before 5 PM each night. Since I had never been on the train before, I grossly underestimated how long it would take to get home; by the time I got to my stop, it was already dark. I got off and quickly walked in the direction of my house.
Then I heard it: scrrraaaaape. More