Rodrigo pretty much repeated the technique he showed us last Thursday, which was great because for the life of me I couldn't remember it!
It's an attack from the mount with three variations. The first attack is a collar choke. The second attack is an arm lock. The third attack is both a set-up and an attack. It leads to taking the back and attacking with a collar choke.
To make sure I've got it down, I'm going to just talk about attacking the guy's right side from the mount.
Grab the cuff and the collar (same side with the cuff, crossbody with the collar). Ideally, you want to get a good grip lower on the elbow. It will make it easier to lift him over to his side.
Step up with the side opposite the cuff and collar as you pull him in the direction of the step up. Here, that would be the right leg stepping up, cuff and collar on the left side, and lifting his opposite side up.
As you do this slide your left knee under his head. It's that same move the Saulo Ribeiro does from the mount. Rodrigo calls it "the pillow".
His collar should be in your right hand. Reach under his chin with your left hand and with your right hand pass the collar to your left hand to lock in a collar choke. Pull your left arm back, elbow tight against your side for the choke. With your right hand reach back behind his head like a RNC and press his head slowly forward.
That's the first variation. The second variation assumes that the guy has countered the choke in the classic way by pulling the "behind the head" hand off. From here, you trap the arm by reaching around and grabbing your gi. Then reach out and scoop up his other arm near the bicep (he should be more or less on his side, and that arm shouldn't be very helpful for him anyway). Step around the head with the left leg. YOU DON'T HAVE TO DO THIS TOP SPEED. I kicked a guy (Big Griff) in the eye tonight trying to do the damn armbar too fast from the mount. The trick is to move efficiently, without haste, but not necessarily FAST ... You've got more time than you think.
The third variation assumes that the choke attempt and the armbar are defended. Now you will take his back for points and the possibility of a choke attack. Take your left arm and reach OVER his bicep. It is important to reach over his bicep because that will keep that arm from blocking your attempt to sink in your left hook when you roll him. With your right arm you've still got the collar.
Shoot your left leg (the "pillow" leg) out--almost as if shooting out of the top of his head. Rock him back into you, dragging your right leg across his body to sink in the right hook and bring your left leg around to sink in the left hook. Again their is a collar pass. As you roll, pass the collar from your right hand to your left--the hand that was holding his bicep with the over grip.
If you had an under grip on the bicep, not only would it have been easier for the guy to fight off your grip, but also it would have made it easier to defend the "pass the collar" set-up for the collar choke. With your arm over his, their is nothing to block the handoff. Pull the collar toward you from the left.
Alright, it's getting late. I'll add the sparring notes tomorrow.