Well, this was over a year ago. The experience has puzzled me ever since the night it had happened.

One night, I awoke at 3AM to the center point my back violently lunging upwards. Involuntarily, of course.
All previous dreams were shaken out of me, the only detailed image I can remember is being in an unearth-like area. No hallucinations, and it hasn't ever happened since. Sound like sleep paralysis?