View Sleep Paralysis A Waking Nightmare Images. Although sleep paralysis is a common symptom of narcolepsy (a condition characterised by uncontrollable bouts of deep sleep), around 40% of furthermore, most people in modern western societies, although somewhat shaken by the experience, just shrug it off as some kind of nightmare. Sleep paralysis is a recognized medical condition common in narcolepsy, but which can also be found in otherwise healthy individuals.
But for some, the experience conjures hallucinations that make nightmares.
You wake up but your brain is still dreaming — and it's projecting your nightmares into the real world. Sleep paralysis is a often terrifying disorder where sufferers can experience a 'waking nightmare'. Sleep paralysis, or old hag as it is sometimes called, is a relatively common experience, but it can still be extremely frightening if you don't know what it is. Although sleep paralysis is a common symptom of narcolepsy (a condition characterised by uncontrollable bouts of deep sleep), around 40% of furthermore, most people in modern western societies, although somewhat shaken by the experience, just shrug it off as some kind of nightmare.