studies in motion call for their own 'in house' set of perceptions. static views are okay, but this double-punch thing can only be experienced non verbally and that through practice. The body knows what to do, mechanic-wise, even though we may not. you are right
As it's risen... I saw a video on Instagram about double hip recently (might have been Brian Bates?). It's something my JJJ and Wado Ryu instructor has done with us. I'm a fan!