once while attempting to WILD in bed i had a somewhat similar experience.

i was lying on my back, and felt SP start to come on.suddenly i started to turn slowly, then within a few seconds VERY quickly. so fast that my 'dream arms' and legs were spread eagled from the centrigal force. for a second i feared they would smash into the nearby wall to my left, but then realized they obviously couldn't be my real limbs

it felt like i raised about three inches off the bed as i rapidly oscillated for about twenty seconds, then woke up.

pretty wild experience.