From sitting on the bar (and therefore usually performed as a dismount from the catch trap). At the back of your swing, drive your legs upwards to generate rotation and tuck as you roll backwards off the bar for a triple somersault down to the net.

These notes are provided ONLY as an explanation of the trick.
If you want to perform it yourself - get an expert to teach you.
This trick is a progression of the following trick:


Other variations of this trick: