Trick starts like a layout somersault. After leaving the bar, perform a triple somersault with a full twist before opening to the catcher. Full twist usually performed: In first somersault ('Full in') In third somersault ('Full out') Half in first, half in third ('Half in half out'). This trick can be performed straight, tucked or piked.
You can find out more about this trick in my books:
Thanks to Pneumatic Arts (@pneumaticarts) for providing a video for this page.