I was in a tournament this weekend and was fighting a physically strong opponent. From gaurd i managed to put him in a oma plata, had my hand over his back and was leaning forward to finish it when he just postured straight up so he was now only on his kness (as opposed to on 4 points, or three as the case may be, since i had one arm wrapped in the oma plata). My question is, how do you prevent someone from posturing up off of 4(3) point s when you are trying to sink the oma plata in?