I usually don't have a problem with this one. If someone falls back, I standup with them. If they cinch it, I will try to keep my foot at 90 degrees and push it farther in (so my ankle joint is way past their armpit), and I will try to peel off the controlling leg and sit on it, then scoot out to that side. Is there anything else I can add to this list of things to counter/prevent the straight ankle lock? There is this guy in my class who is damn strong and if I'm not careful he will muscle one out on me. He actually did it to me yesterday while I was doing it to him....had his leg completely controlled properly, except I left my top (controlling) leg just too near his side, he peeled it off and wrenched it out that way without having control of the leg or anything.... Pissed me off.