Ralph use to do the same, try to "snap himself out of it", in that he would not be able to move his rather paralyzed body, (the body is sound asleep when this happens), called by some "sleep paralysis", but the mind (the Brain?) is wide awake>.......
therefore fear ensues, as is natural for all of us, as part of the "fight or flight " animal kingdom. It's a natural reaction, (autonomic nervous system) to not want to die.,and we fear due to feeling, we will die if we don't wake up the rest of the body.
Fear will pass..........with effort and patience and trying. It did for Ralph, but he didn't try consciously anymore, it just happened of it's own accord.
But I was told that "Fear" stands in the way for most people,and so one needs to have faith and not fear that they will die or not come back to the body.
There is nothing to fear but fear itself.
It's part of what we are as human beings, the spiritual body, the astral body, and the physical body.
We are simply separated one from the other, by our own mindset.
No one dies or doesn't come back, even if they are an athiest who has no belief in anything......or a scientist like Robert Monroe.
By persistent trying, he was able to go and come back successfully thosuands of times ......there is nothing to fear, but you will no doubt, meet your own thoughts, so if one is nasty, angry,bitter in their conscious life, they will meet up with, nasty, angry & bitter events (there) as well.
We create it all.