It call “Sleep paralysis”. Although you can feel like you can open your eye and see things around you but whether it’s real surrounding or not just your imagination, don’t know, but normally it’s black figure and if you watch enough scary movie that have a devil or evil spirit, or read or hear haunted ghost story, chances are your head will fill with these figures when you encounter “Sleep paralysis” It can last few secs. to an hour or some rare cases hours. It can be very scary and effect your quality of life, it can happen day or night, to anyone, even taking a quick nap. Someone people would say it’s a dream within a dream where you cannot move because you’re inside your dream, your body is paralyzed. Sometime you feel like a ghost or devil evil spirit spin you around and feel your bed move or pinch you down you can feel your bed move or bounce, but guess it’s all in your head 🙂 it call sleeping paralysis, it impact many people, including me. Younger age I encounter while sleeping I kept on falling and falling never reach the ground, just kept on falling. Then later in life first stage of sleeping I normally encountered a devil pinching me down and I can’t move, all I can hear is ghostly sound, and I’m not sure if my eye was open but I can see a few devils evil spirit surrounding me, but I fought and 100% of the time I won. Sometime I feel the cause was by working too hard thinking too hard and so on. Now a day, I rarely encounter those anymore, even after watching haunted house documentry or scary movies. It’s not too bad, different people have different ways of preventing it, in very very very rare cases that people died from it, but it does happen, where a person could not woke up, it’s old people up the mountain in vietnam h’mong people elder died from these illness a lot. More information about this see here http://en.wikipedia.org/wiki/Sleep_paralysis
