When your opponent drops to a knee to get on top of you and go for an under hook frame across his chest and shrimp out. He will anticipate your next movement and get the under hook. Once he gets the under hook, switch to dig and go for the Omoplata. Step on his back, put your knee together and step one leg over and turn to that side. Come up and grab a hold of his back to turn him. Now you are in control. Open his lapel and reach to his sleeve as he rests his head thinking of how to escape. Once you grab the sleeve , lock it and drive your leg closest to his head around his body bringing his arm up in between your legs finishing in a deadly armbar.