The flyer starts in an Uprise position (however they get into this). At either the frontend or the backend, the flyer rolls forward, opening their legs to catch them between the cables and moves the bar down their body into the Bat position.
The best application of this trick would be for an embellished Bat catch where the flyer leaves the platform in an Uprise position, rolls down into a Bat and then makes a Bat catch. This is shown in the videos below.
Thanks to Moira, Danny and Ian for providing a video for this page.