This trick can only be performed on a bar to bar rig. Flyer A swings out and performs a Straight Jump to catch the other bar. Flyer B swings out and performs another Straight Jump, arriving as Flyer A returns to the middle. Flyer B holds onto the bar and wraps their legs around Flyer A in a Piggy Back position. They swing to the platform and back to the middle. Flyer A bends their knees and Flyer B pushes off the bent knees and turns to catch the other bar.
You can find out more about this trick in my books:
Thanks to Alain and Celine for inventing this trick.