BJJ Globetrotter Camp (Olympiastützpunkt Rhein-Neckar) Kenny Polmans, Heidelberg, Germany, 18/08/2018
Kenny went through what I'm calling shoulder clamp. It's a bit like technical mount. Starting from a typical mount, they have crossed their arms and are protecting their neck. Reach under their forearm, sliding it through until you can get your elbow onto the mat. You also have your toes on the mat, ready to drive forwards.
From that position, you can power your knee up as you bring your elbow back. The goal here is to capture their arm at your hip. As your arm slides back, grip their shoulder. Your hand on the other side pushes into their other shoulder. The goal is to twist them up onto their side. Once you've made that space, immediately fill it with your leg, behind their shoulders. Make sure your foot is tight to their bottom shoulder, as you don't want them to be able to bring their shoulders back down to the mat.
Lean forwards slightly to move your weight onto them. Fold forwards too, in order to make certain their arm stays stuck by your hip. For a simple submission option, reach back with your arm and grab their wrist. Push it down and slide it along your leg for a shoulderlock. Alternatively, you can simply grip their hand and pull it back into a wristlock.
To secure a grip, there are two main options Kenny suggested. The first option is to wrap your same side arm around your knee, reaching under their head. Your other hand locks that in place by grabbing your wrist. A gi option is to instead reach behind your own leg, grabbing the back of their collar. There are several other submissions you can go for if the initial shoulder lock isn't viable. The two main options both involve bringing your leg over their head. If you're flexible enough, you can just swing it over. Should you need some support, slip your other hand behind, then guide the leg over.
For the armbar, bring your hips up higher on their body. Push their head to face down, placing your arm in front of their head. You can use your other hand out to the side as base, or possibly grabbing behind their leg. However, be careful: you don't want to lose your balance while you have their arm tightly trapped, in case of injury. Rotate around the arm you have trapped, then slowly drop back. You might be able to get the submission by leaning back, if you've secured their arm under your armpit. If not, you can adjust into a standard armbar, adjusting their arm to your chest.
If they manage to secure a grip on something, preventing the standard shoulder lock, you can switch to an armbar, or an omoplata. The omoplata is fairly simple. Raise up your other leg, stepping up with your foot like you were basing for knee on belly or a knee cut slide. Slide across towards that raised foot, dropping into the standard omoplata. Kenny makes a point that he drives his hips directly forwards, rather than the orthodox way of leaning towards their far ear. As ever, you can wristlock instead if that isn't working.