Artemis BJJ (MYGYM Bristol), Can Sönmez, Bristol, UK - 17/10/2016
I first learned this choke from BJJ Library, demonstrated by Saulo himself. He calls it the Saulo choke, but in the interests of being descriptive, I'm currently going with single arm cross choke. From high mount, you start by feeding your hand into the opposite collar, an initial step common to most chokes from mount. For this one, insert your thumb so your hand is palm down.
As with any cross choke, Roger's tips apply. Open up their collar and slide your hand in, then jam your elbow into your same side hip. Use that addition leverage to power your knuckles right to the floor, then bring your elbow. This will press your forearm into the side of their neck. You need to turn their head a bit as you do that, in order to expose the side of the neck properly.
At this point, you can also lower your head to the mat by your choking arm hand, to make sure you stay on the same side as your palm down grip. The more you bring your head away from your choking arm side, the easier it is for them to roll you over. To finish, bring your other hand underneath your own stomach, gripping low on their other collar. To finish, pull on that collar and twist your body away, rotating towards their legs.
Teaching Notes: Most of my teaching focus was on the format today. My back is still fairly bad, so I couldn't demonstrate. Instead, I did it by proxy, puppeting two of my students through it. I think I've done that before when I've been injured: not ideal, but it's a good solution when I can't get cover. ;)