Swing out and get into a Bat position on the bar (as if doing a Bat catch). The catcher on the Static Top Cradle reaches down and grabs your ankles as you reach the peak at the frontend. Swing with the top catcher in ankles. This trick can then be followed by a 'Catch from Ankles' down from the Top Catcher to the Swinging Catcher (or the second fly bar on a bar-to-bar rig).
Thanks to Ian and the team at All Bars Flying Trapeze for inventing this trick and sharing the video.