"Sleep Paralysis" is the process when your body is in the middle of being awake and asleep. Your body lock itself down to a state where you cannot move at all, to prevent your body from acting out your dreams. It happens every night, you just don't remember it. Now while this is happening you might see"Hypnagogic imagery", aka sleep hallucinations. It's simple hallucinations wich WILL be very scary the first time experiencing it. It can come in many forms, for example: Aliens in your room, someone sitting next to your bed/in your bed, and my personal favourite: Big scary spiders from hell. Still DO NOT let this discourage you, they CANNOT HARM you in anyway. Just relax and think of a beautiful beach... Soon you will find yourself in the dream, thus becoming lucid. Please ask me if you have any further questions.