For a while now I've seen lots of AMG videos about "The Magic Move", reconnecting the trail arm to the side first move down. This is the first video I've seen where they describe how it needs to disconnect off the side again.
From my own perspective this feels like it was a missing piece. It's an interesting swing cue for me to not forget to launch the arm back off the ribs or continue driving through the swing... the right arms job isn't over after reconnecting.
Since I first watched this video a few days ago, in my mind's eye I've been wrestling with this image of a swing plane relative to my right shoulder joint rather than just the actual swing plane and trying to reconcile it with the rest of my idea of a swing... My mind's eye tends to leads me off a cliff sometimes so as I said jury is still out.