The classic definition for this phenomenon is called sleep paralysis. It may last a few seconds, several moments, or occasionally longer and usually occurs right before you are about to fall asleep or wake up. Many people report feeling a “presence” that is often described as malevolent, threatening or, evil, and usually experience a tremendous amount of terror. How many of you have at one time or another woken-up unable to speak or move in the middle of the night? If you have, we would like to inform you that you are not alone. This phenomenon is called “sleep paralysis”. The strange phenomena are actually not uncommon. Those who experienced they suggests, ‘it lasts a few seconds, more than a few moments at most, or infrequently longer and usually occurs right before you are about to fall asleep or wake up.