Just saw this new video and at 0:36 some guy holds a reverse planche on parallel bars. Its absolutely incredible and never thought it was possible. I guess its kinda like a manna but with legs out straight. Also watch the whole video, its amazing!
http://www.youtube.com/watch?v=Bfug6Y7MKE0
Also heres the original video of this guy doing the reverse planche and other stuff: