Sounds like out of body experience to me. When you are paralyzed you are disconnected from your body. You could exploit it and roll out of your body. But it is difficult to master as you are caught off guard. Startled as it doesn't happen often.
Just the other night I awoke to what I thought was a dark being crawling on my body. I was paralyzed. It could have been a being or something I created. I just stuck my tongue out at him and he went away. It could have also been my astral body floating above me as it was returning.
Not completely sure what it was so I just went back to sleep as I was in no mood to get out of my body. It hadn't happened for quite a while so I was a little scared at first until I realized it was just one of those metaphysical experiences again.
So You have natural ability and it isn't a negative thing at all. You just have to learn how to control it.