I get it. My apologies. (Stepped through the video frame by frame.)
You’ve obviously got to bring together a lot to pull off these kinds of manuveres, both in mind and body. I don’t see how you can get a handle on it until you’ve done it a lot - until you reach that point when time sort of feels like it slows down, and your mind and body are processing, making the right kinds of corrections at the microsecond level. It takes time for the mind and body to come around, you’ve got to open up new pathways in your brain and reinforce pathways to the right muscles.
I’m under no delusions, physics helps, but surfing in the end is 90/10 as in 90% surfer 10% everything else. (Maybe that’s an exaggeration, but maybe you get my point too.) Something in my mind seems to hold a fascination with design, so that’s the way I’m incline to see and think, we are what we are.
Anyway, aside from restating the obvious, “I got nothing.” (So I’ll shut-up.)