So one day I was messing around and out of impulse and curiosity, I decided to fight one of the Greybeards, the leader, I knew he wouldn't die, being essential, but I wanted to see if I could force him over the mountain cliff. I don't care what anyone says, these are the strongest people in the game, making no noticeable dent in their health. He would freeze me in ice and I couldn't get out unless he attacked again, the very instant I was getting to my feet he would freeze me again, allowing me no control over my character whatsoever. Anyway here's the point, and I'm sure a few people on this forum have witnessed this. If he freezes you and you go down the mountain, well lets just say it triggers the beyond amazing bug that I hope Bethesda doesn't fix, only makes the Geybeards seem even more badass. This video, is pretty much EXACTLY what happened to me, except I never got stuck in the sky. Just thought I would share this with everyone, I think it's pretty funny.
http://www.youtube.com/watch?v=F5-kO_iIzhU&feature=player_embedded