Swing out. As you come back to the platform, sweep back hard and as you rise into your set, rise up into an Uprise position on the bar. As you approach the peak at the front end, bend your arms and legs ('pump') and then straighten them suddenly ('shoot') to propel yourself up and over the bar, twisting in the air.
You can find out more about this trick in my books:
Thanks to Tim and Jean-Francois for providing video for this page.
IMAGE CREDIT: Thanks to Emerald City Trapeze Arts. Flyer is Laura Scoop. Thanks to David Treadwell for the photo.