Hi Travis,
You were most probably in a deep hypnotic state, a good and nice trance. As far as I know it's a very pleasurable feeling. 
The movements you described were "unconscious movements". Unconscious movements are jerky, and are not willed by the conscious mind. In your case you were able to have some conscious involvement because of the deep trance.
A good example of unconscious movements is the finger signals that hypnotists and nlpers sometimes use. Yes for the right forefinger and no for the left. That way you can discuss with somebody's unconscious mind with yes/no questions.
Hope you will have lots of this kind of experiences in your future! Continue experimenting....
May the door be with you,
-purjo 
