I need some tech advice. I met this guy last night and got to roll with him for a couple hours. His submissions were limited I think but he was an amazing wrestler. So I mostly had my hands full fighting for position. My question is, What do you do with someone that can posture out of almost anything? He was probably about 15 pounds heavier than me and alittle stronger but still. . . If I was lucky enough to break him down and get to any stage of the rubber guard he would just sit up, sometimes without even putting his hands on the mat. I couldn't manage to get the Invisible Collar but crackhead control, meat hook, and pushing my foot hard into his hip didn't work. He'd just sit up, and I tried hanging on and goin up with him and workin it from there but he'd just shake me off. Advice??