The evolution past handstand pushups - I've been working with my hands on tall boxes to replicate the "elevator". Decent results.
The body leans towards the wall slightly, and notice how the elbows/arms move behind the torso. Careful with the set-up - it's easy to flip over and/or put yourself on your head.
CREDITS
First clip -
flying rings late 60's youtube clip
First music -
Giorgio Moroder - Tears
Second clip -
That's me.
Second music -
DJ shadow - Organ Donor