This drill is working a technique used in yesterday’s active-shooter class. It’s for fast moving and shooting in confined spaces, generally with up-close targets. In this position you don’t get a sight picture, so you’re relying on natural aiming with your muzzle tracking with your eyes as you turn from the waist (not the “hips” as I said in the video).
I spent this morning working this technique with various drills just to see how to maintain good accuracy without a sight picture. It worked out quite well. I was getting good A-zone hits to body and even the face.
It’s pretty intuitive and once you learn how to position your pistol and how big movements affect your accuracy tracking, it’s not hard to be effective with this compressed position.