Have you ever woke up to find yourself completely paralyzed, unable even to scream? This strange phenomenon does happen to a lot of people.
Since history began there have been reports of people who had awakened from a nightmarish sleep only to find themselves unable to move or even make a sound. Typically the person will feel like they had just had a very bad nightmare, but they will not be able to remember what it was about. You just have this feeling of terror and helplessness. Sleep paralysis generally lasts only a few seconds. though it may seem like much longer to the person experiencing it.
I have personally experienced sleep paralysis and I am sure that many of you have either had this happen to you or you know of someone else who went through it.
Modern science calls this condition sleep paralysis and tries to offer a logical explanation of how it happens. The old timers said that sleep paralysis was caused by a paranormal entity they called The Old Hag.
A very good friend of mine has written a very nice introduction to the phenomenon of Sleep Paralysis as well as a background of what is known as The Old Hag or The Night Hag.