"I had a randomly assigned roommate in college who was a very sweet, religious girl. She kept to herself mostly, but she was always really kind and polite. This was the first year I didn't seem to have a b*tchy roommate, so I was excited to get along with her.
About two nights after we get moved in, I wake up to hear someone sobbing softly outside my bedroom door. It was a really weird sound - this kind of desperate, creaky sobbing - and I was so f*cking scared at first because it sounded like the sh*t you hear in horror movies (or like The Witch, if you've played Left 4 Dead). I heard someone moving around the apartment and occasionally coming back to my door, scratching on it softly, so I finally summoned the courage to peek out of my bedroom.
My roommate was just walking around the apartment, crying. She was sleepwalking apparently, because her eyes were closed, but when I opened the door her head turned to look right at me. Then, she slowly went to the kitchen table, picked up a pencil, and started to scrawl this weird symbol on her door. It looked like a circle with a triangle in it. I asked her if she was okay, and she just stood there, swaying and crying, and I was basically just like "nope" and locked the door.
The next morning, she was really scared and mad at me because this demon symbol had appeared on her door, and she thought I had done it to prank her. She didn't believe me when I told her she was the one who did it, but accepted my denials that I did it, and we dropped it...
Several times throughout the year, I'd wake up in the middle of the night to her in the kitchen, talking to herself. Every time, she would come to scratch softly on my door, and every morning, there would be another symbol on her door; she was still convinced it was me f*cking with her. I considered filming her, but honestly I was REALLY scared of opening the door because I watch too many scary movies about demons and sh*t.
Then one time, we were in our separate dorm rooms when there was a huge BANG! from her bathroom. There was obviously no one else in the dorm, so we were both really freaked out, but we decided to investigate. We looked everywhere and nothing had fallen down, and there were no windows or other doors to the bathroom other than the one leading to our living room. We pulled back the shower curtain, and there was a huge arc of blood on the wall. She went pale, but had no explanation for this.
Later that night, while I was studying in total silence, she rushed into my room and demanded to know what I had said. I asked her what she was talking about, and she said she was in the bathroom and heard me "talking to her" like I was "whispering something through the wall." Nope.
After that, whenever she was gone for the weekend, I always heard weird noises coming from her side of the dorm suite in the middle of the night. Nope, nope, nope.
She moved out at the end of the year, and that was that, but I've always wondered what the f*ck that was all about..."