I am an avid lucid dreamer and can achieve lucidity usually after a few nights of preparation and trying. Occasionally I can become lucid on the fly. I have used both the deep sleep method (dream signs in rem after blank cycle) and the falling asleep lucid technique (falling directly into dream state lucid).

I had a very troubling experience last night which I would like to share to see if anyone else has had something similar happen.

I was achieving lucidity by remembering past dreams while falling asleep. I successfully entered a lucid state directly into a dream. Descriptions aside, I was exploring a secret hallway at the place I work that led to a library. As I finished exploring the library, I exited into an open field in a night setting. Stars, trees, etc.
I decided that I would lay down in the field and try to sleep (while already asleep lucid) As soon as I layed down and closed my eyes in the field all my senses were assaulted by what was something like an electric shock combined with a buzzing sound that was startlingly loud. Remember at this point I was fully lucid and aware that I was dreaming.
For some reason trying to 'fall asleep' while in a dream triggered a shock of some kind. I tried to tell myself to "wake up! wake up!' but I couldn't. I had several false wake-ups (waking up still dreaming once or twice) until I finally woke up for real, goosebumps on my neck, and frightened out of my wits. I was paranoid about being abducted by aliens or having something jump at me from behind the foot of my bed or something- quite edgy.

Has anyone else had this happen to them while lucid? I believe trying to fall asleep in the dream caused it. I may repeat the process just as an experiment.