https://youtu.be/n6noJ1s9W5I

The details:
http://hanggliding.org/viewtopic.php?t=32801

Not necessarily what it seems in the video.

Jonathan's take:
http://hanggliding.org/viewtopic.php?t=32801&postdays=0&postorder=asc&start=7

Robe McKenzie's take:
http://hanggliding.org/viewtopic.php?t=32801&postdays=0&postorder=asc&start=87

Jonathan's follow up:
http://hanggliding.org/viewtopic.php?p=369493#369493