Well, either it was sleep paralysis, or being paralyzed in a dream.

Some people are paralyzed in some of their dreams, much like not being able to run quickly or having no force behind punches, except much more powerful. If you were, I doubt there is much to do... except become lucid, and tell yourself you can move.

If it was sleep paralysis, that means your body is asleep, so you could WILD from that point.