This scary story/urban legend is also known as “Aren’t You Glad You Didn’t Turn On the Light?” Which is a longer title, but it may be more familiar to people.
This story revolves around two college girls who were friends when they were younger and wanted to be roommates in college. They got their wishes and were roomed together at the start of school.
One night they were both up late studying for an exam that was happening the next day. One of the girls got tired and went to bed while the other one stayed up and diligently studied. At some point, she realized she left one of her books back in the bedroom and snuck back in so she didn’t wake her roommate up. She didn’t turn the light on and was trying to feel around for her book when she started hearing heavy breathing and she asked quietly if her roommate was awake. Her roommate didn’t say anything. She heard something move and asked, “Can I turn on the light?” She got no response. She asked again and got no response again. She gave up and continued looking in the dark for the book, found it, and headed back out to continue studying. She stayed up all night and when the time came for the exam and went to go take it, but noticed her roommate didn’t come. When she got home she knocked on the door to see if she was okay. She didn’t get a respond so she opened the door and saw a horrific scene. Her roommate was laying on her bed motionless lying in a pool of blood. She had been brutally murdered. She looked around and saw on the wall behind her words smeared in blood that read, “Aren’t you glad you didn’t turn on the light?”. Talk about disturbing.