"This one is from a teacher of mine. He's a great guy, but he swears on his pride that this one is true.
It was during his college days. He was living in an apartment with three other guys. They had been living there for a couple weeks when weird stuff started to happen.
One night, they had some friends come over, so one of them had to sleep in the futon in the living room. The friend was woken up in the middle of the night for no real reason, but when he opened his eyes, there was a thin blonde girl hunched on the ground next to him. Now, not much can make a 6'4" 250-pound tough guy panic, but this did. He just started hollering and yelling for his friends to come out as he grabbed for every square-inch of the sheets. His friends thought he was just messing with them, but his face said otherwise. They just hung out for the rest of the night until he calmed down.
They eventually ordered pizza just because they were no longer tired. When the delivery guy got here, he was surprised.
"Hey, this was my old place when I was in school."
My teacher chuckled. "Hey, did weird sh*t happen when you lived here?"
The pizza guy went blank. "Oh f*ck, you've seen her too?"
They moved out the next day."