Here are the three.
The first is the armlock attack from Jean Jacques Machado. Underhook the arm on the same side as my trapped leg. Then post up with the free leg and work around the guy's head in the free direction.
The second is the Marcelo Garcia pass from the previous post.
The third is this one from Saulo Ribeiro. Actually, Saulo is showing a way to sweep this half-guard pass. But the half-guard pass the guy attempts is interesting and different from other passes that attack the upper body more or less head on. It involves switching the hips and scooping into a reverse that attacks the hips.
Essentially in this pass, if you get your trapped leg free, then you end up in side control. Position-wise, you want to keep your weight on the guy when you reverse your hips. By "reversing your hips" in this example I mean sending your outside hip into his ribcage and pulling the hip of the trapped leg out. Basically, you are putting your body between his body and his legs.
This last half-guard pass is a nice compliment to the Machado, trapped side underhook, armlock attack. If the guy is really fighting off the underhook (as that purple belt, Rafael, did), then it would be nice to have something that attacks from an almost completely opposite direction. The scoop pass might do that.
