He he... that fear of being "crazy" is a big one isn't it? Luckily for me now all my friends are "crazy" and I love it! We call it " crazy-in-a-good-way" ha ha.
This has been happening to me a lot while meditation. I have been able to move my energy around and relax targeted muscles. There is a lot of popping going on as if energy blocks are becoming unblocked.
Recently my head has started to move around and with each movement, there is a snap or pop and suddenly I am deeper into the black, velvety, serene place. Last night while meditating my intention was to connect with my source energy and feel it's pure energy and let go of stress. All sorts of popping and involuntary movement went on and I went from sitting crosslegged to eventually lieing flat on my back. At one point there was intense pressure in my chest which somewhat scared me but as I let my body move, it subsided. Then my hands started to move. I'm not sure what to make of all of it.
Is it my own source energy unblocking my energy blocks? Could it be an entity like a spirit guide trying to communicate?