Also haven't you heard about sleep paralysis - this shit is really scary - you feel awake, but you can't move or make a single sound. Your eyes are widely open, and you've got that strange feeling that someone else is in your room, sitting and watching how you sleep. And you try to scream, but nothing happens. And then you finally wake up. I really hate that feeling.
2 years ago i was alone at home,and i wake-up in the middle of the night felling chilli,i tried to wake-up up from bed and i couldn't move...was so so freaking scary....i couldn't go back to sleep.I didn't know was called sleep paralysis,all was so real and scary.