Drew showed me this sneaky submission that you can try when your opponent just gets you in a referee’s position like turtle.
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You just turtled, either from a failed takedown or to prevent a pass. Uke is behind you trying to gain control, rather than at the side.
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Look under your legs. If you see his leg or knee between your legs, then you can go for the kneebar. If it isn’t, you can sometimes reposition yourself first so your leg is between his legs.
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Dive under for it. You want to dive like doing a forward roll, so make sure to move your head out of the way. Stay close and shoot your legs through his legs as you roll. Try to roll in place without much Cartesian displacement.
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Shoot both arms deep behind his knee as you roll too. Keep your hips close to his and try to prevent him from tying his legs up in a figure-4.
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You should end up roughly perpendicular with him with your side on the ground. Now is the time to execute the Kneebar
Number one tip for success: Your free leg must kick behind his armpit HARD. You do not want to end up on your side, and you do not want to need “momentum” to finish it. Knock his ass forward with the leg in the armpit.
Head in/out is a matter of choice. The majority opinion is to keep your head out (Kesting for example). However Michael Jen’s view is to keep the head in, like a rolling kneebar from standing. Both have advantages. Head out, you can kick the armpit and roll easier. Head in, however, there is a “sideways” sweep you can do. I think it’s ok either way.
Kneebar from turtle is a very much momentum dependent move. The more powerful roll, the more the success you’ll have finishing it. Here’s a good discussion on executing a kneebar from a turtle.
Posted by Frodo 