As I go to sleep I go into a sort of trance state, especially if I start to fight to stay awake. Sometimes this leads to temporary meditation, and a lot of the time I hear voices that startle me out of the state. For example, just last night I heard some kind of menacing, croaking (weak) voice mocking and laughing at me. I immediatly woke up, turned on all the lights in my room and shouted in my mind "F*CK OFF!!!!!" Worked a bit... I could still sense the b**ch hanging around floating outside my room O.o