It's a weird feeling when you recognize what it is, and horribly frightening when you don't know about it and think you've been visited by aliens, ghosts, or demons. This is made even worse by thinking you're going nuts and being afraid to tell anyone about it; people spend a lifetime with their secret trauma, when they could have just told someone and found out that it was nothing more than a fairly common effect of waking up at the wrong part of the sleep cycle.
The trick is to ask them to read something twice; if it comes out the same each time, they're really there. Otherwise you're experiencing sleep paralysis. Or they're just messing with you.
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The only freightning thing I experienced is sleep paralysis (http://en.wikipedia.org/wiki/Hypnagogia#Sleep_paralysis). But this too presents no dangers, it is just a weird and uncommon feeling =)
It's a weird feeling when you recognize what it is, and horribly frightening when you don't know about it and think you've been visited by aliens, ghosts, or demons. This is made even worse by thinking you're going nuts and being afraid to tell anyone about it; people spend a lifetime with their secret trauma, when they could have just told someone and found out that it was nothing more than a fairly common effect of waking up at the wrong part of the sleep cycle.
But it helps if you're visited by aliens, ghosts, or demons, because you can mistake that for sleep paralysis, making it not very frightening.
The trick is to ask them to read something twice; if it comes out the same each time, they're really there. Otherwise you're experiencing sleep paralysis. Or they're just messing with you.