Half turn swing, 1½ twist to catch
Leave the platform and turn around at the front end. Swing back to the platform and force out over it. On your way back, sweep back hard and rise into a set position with the hips pushed towards the bar, and your legs open. At the peak of the swing, let go of the bar and turn, closing your legs to accelerate the spin as you make a one and a half turn to the catcher.
Notes: This video shows two tricks, a nice forward over, followed by a pirouette.
You can find out more about this trick in following books: