This is a trick that Cyrille and Poiboi have both made use of a lot that I'm a big fan of--it's a pair of inner arm rolls performed such that the arms start spread out and then come together to perform the catch. As I worked through this, my original conception of the trick was to have the planes of the handles and tether flush with the back of my arm, but I realized as I played with it that instead the planes had to be at a slightly oblique angle as the direction of the head follows the angle of the tether in contact.
