Interesting. I hadn't thought of that.
So why did he do it?
I have no idea why he did it. But as I said, I’ve seen that particular move taught as a way to subdue someone. Notice the guy went down to his knees pretty quickly. It’s one of the areas of the body that is a pressure point that can cause pain.
Choking someone out takes quite a bit longer than that. Something I learned in boot camp.