Swing out and then rise up to an Uprise position at the backend. Just before the peak at the front end, push your straight legs under the bar towards the catcher. Keeping your body straight, let the top half of your body fall backwards. You will roll around the bar and end up under the bar with your stomach facing down. Lift your head slightly to see the catcher.
You can find out more about this trick in my books:
Thanks to David and Fly'n Fit Trapeze School in Japan for providing a video for this page.
IMAGE CREDIT: Thanks to Emerald City Trapeze Arts. Flyers are Andrea Correa and Laura Scoop. Thanks to David Treadwell for the photo.