Gordon Ryan vs Buchecha: the most dissected match in modern grappling — what did you actually see?

Watch the second leg drag entry at 4:42. The grip switch is the entire match. Buchecha gives up the underhook for half a second and Gordon never lets him have it back.

Most analysis I've seen focuses on the pace. I think the pace is downstream of that one grip moment. Curious what other people see when they slow it down.

Drop a timestamp + what you're looking at.