Swing out and turn around. At the platform, lift your legs up in front of you under the bar. Position the bar behind the top of your thighs and straighten your body so your arms are straight. Squeeze your butt! As you reach the front end, let go of the bar and make a half turn to catch wrists.
You can find out more about this trick in my books:
Thanks to Matt, Ted and the team at Circus Arts Australia for providing this video.