I love trapping the hand like that! I call it the Joe Friday pass, because he used to do it to me all the time.
Once I trap the arm I like to pop down into a Tozi Pass and then transition to a North/South choke. In fact, that's the only time I ever use the N/S choke.
Once I trap the arm I like to pop down into a Tozi Pass and then transition to a North/South choke. In fact, that's the only time I ever use the N/S choke.