So last night I decided to try something a little different in my attempts at AP.
I downloaded off a nice Binural Beat and laid down, relaxing to it.
It actually helped to some degree, as my body got pretty heavy really fast. But that was about it. After about 5 minutes of the heaviness setting over my body, I experienced this HUGE jerk throughout my body, and then I quickly relaxed again.
Another 10 minutes went by, and soon I got this huge itch on my nose. Couldn't resist it ;-;
What was that giant jerk?
I too have had the same experience. I was listening to isochronic tunes, and as I was drifting away, I jumped. I think this happens because our body AND our consciousness are drifting but we are remembering we are trying to have an OBE and we just jolt due to habit. I don't know about you, but when you are really tired and you just sit down for a little and close your eyes, as you go farther and farther into sleep, you experience like a falling feeling and you get scared; I believe it's like that but just imagining different things. Hope that helps but I honestly don't know why it happens.