Scared me silly ythe first time it happened to me too. I've had this phenomenum for years but mine happens at all hours of the night. I've had it explained this way. As LP stated, in REM sleep, (the stage where you dream, you're in 'unplugged mode' for exactly the reasons stated... so you don't physically do anything dangerous.
Mind you, I remember one night dreaming I was on a runaway horse. By the next afternoon, my muscles felt as though I HAD been. I suppose I should be grateful I didn't have the blisters & chafing...lol.
Here's a twist... sometimes I have this experience, but "float" out of my body. I hover around ceiling level & can floa around the housse... kinda neat.
Mind you, I remember one night dreaming I was on a runaway horse. By the next afternoon, my muscles felt as though I HAD been. I suppose I should be grateful I didn't have the blisters & chafing...lol.
Here's a twist... sometimes I have this experience, but "float" out of my body. I hover around ceiling level & can floa around the housse... kinda neat.