Re: Locking/pinning as pain submission...
I think that taking someone's center is not a physics problem. Nor is it acheived by any strategy other than "taking someones center". If the path to taking someones center is through pain, then you have correctly taken their center. If the path to taking someones center is though leverage, then it is correct as well. Same for just looking at someone in the right way and getting what you want. I think this understanding is most useful.