This trick was performed in 'Ola Kala' - the last show from Les Arts Sauts. It requires a special harness with two loops (like angel wings) on the back, but is included here for completeness.
Swing out and make a half turn. As you swing back to the front end, rise up into a set and the catcher will grab the loops on your back. Let go and swing down horizontally.
You can find out more about this trick in my books: