I'm interested in seeing this defense too. I wonder if it's the Garry Tonon defense. He has the best darce defense that I've seen. He's fought it off from some elite darce chokers. He's defended well against full on chokes from Boogey Martinez, Bill Cooper, Buchecha, and Keenan Cornelius. I'm not quite sure what he's doing, but it works very well. Doesn't seem to matter where the choke is applied from either.