http://www.youtube.com/watch?v=Ogb9xpZcG_E&mode he does a double back from upper arm support.
http://www.youtube.com/watch?v=WRBD0WFbWxA
old school http://www.youtube.com/watch?v=jsXIWqvYlgg
http://www.youtube.com/watch?v=hoRkV3HzXos