Swing out and turn around on the bar. When you swing back to the front end, make a half turn off the bar, followed by a front somersault to catch wrists. Note that this trick is very similar to the 'Reverse Back Somersault Half Twist' except the half turn is performed before the somersault, rather than after.
You can find out more about this trick in my books:
Thanks to Eric and Taz for providing a video for this page.