Today’s legend is going to be short and sweet, but no less creepy. This is a story that seems to be told at the vast majority of college campuses around the US.

Pulling an all-nighter is a common custom on university campuses. The legend says that one night, a young woman came home late after pulling an all-nighter, studying. When she arrived in her dorm, she decided not to disturb her roommate, so she didn’t turn on the lights. Instead, she just went straight to bed. The next morning, however, when the young woman awoke, she found that her roommate had been brutally murdered. But that’s not all the young woman saw. Scrawled across the wall, written in blood, were the words “Aren’t you glad you didn’t turn on the light?”

As far as creepy stories go, this is the type that always gets me. Just the idea of having a psychopathic stranger in my bedroom at night sends chills down my spine.