Sleep Paralysis?

"I curled up next to her with the blanket over my head, though I didn't hear the man walking again for the rest of the night. He was dead." "She saw a demon, it ran right to her face and she was frozen with fear," says one New York resident about his mother who suffered sleep paralysis after seeing an apparition in their home. 'It's hard to have a hallucination when it's bright,' he adds; maybe that story is planted in people's heads. But plenty of people just die in car crashes in the middle of the street.