I can definitely understand it being scary- especially when you have a tendency for it and it feel like you are out of control. But I never heard of anybody where something bea happens to them (except for fear) When I left as a teenager I got back in immediately- scared to death. I think the fear of it also helped my DP along.
When I left as a child, It was perfectly natural, in fact it saved me from my dark room. I am convinced that I am MEANT to do it. I didn't try- it just happened, and if it just happened, it was meant to.
Now, I remember when doing Reiki I "got stuck" right above my head for a few days a couple of times. It was (according to my belief system) a glitch where I could not get back in line. It felt weird, but no weirder than my other symptoms. Just another odd perception. I started doing grounding, where you visualize roots growing deep into the ground from your feet and with the help of a reiki master, I got re-aligned.
When I go now, it is perfectly voluntary. I have to be "in the vibration" (for me, somewhere in between sleep and wakefulness, for Beth, wide awake

Then I hear the high pitch noise and decide "am I going to go"? If I decide yes, I let go. When I decide yes, it is because it is a spiritual experience, when I decide NO it is because I have the creeps. Then I feel a rumbling and as if I am traveling in a very bumpy roller coaster and a feeling like G-Forces against me giving me the impression I am going fast. I always have my physical eyes closed, and my spiritual eyes are closed, but I open my "inner eye" and I see flashes of light fly past me very fast. It feels like I am flying through time and space.
I feel my physical body the whole time. I do not ever NOT feel it. In fact sometimes I get waves of chills come over me (even though I am under the covers). I think about GOD and figure it is something I am supposed to do. I can slip into a lucid dream then and that can be fun too. Because I know I am dreaming I can do things you can't do awake.
It will probably happen tonight because I am talking about it.
Now for the reassurance part. The absolute WORST part of my life is my fear. It always has been. If fear is the worst that really ever happened why fear? Why not let go and enjoy it. This is my philosophy about my OOB's and my DP/DP. But of course that is when I am less fearful. LOL
I know when you are in fear this is the last thing you want to hear. But I believe this is how I was wired for some reason- just me. Just another human experience. And nothing terrible is going to happen to me.
I am 41 and have been doing it my whole life. I don't have a brain tumor, cancer, etc. I am productive and fairly successful. I am just a little different. I can leave me body and I have DP/DR which makes me see the world differently. Most of the time it is an advantage. My life is richer- my husband certainly finds it funny, cute, quirky, vulnerable etc. He says I am perfectly imperfect. I would be paralyzed if I feared this. But I am not and I guess because I don't want to be, I try to accept it as best I can, by telling myself that it is really a lot better than what I fear.
Gwen