This isn't really a submission I guess . . . I mean, I know this move ONLY through wrestling but I do know it's intensely painful.
It was my favorite wrestling move and our school was actually so notorious for it that teams would go over it before they wrestled us. In these clips, after the guy gets the hook in, they usually force the other guy's arm over to finish the move. One of the cool things about it is that an unprepared opponent sometimes might try and grab the top guy's head in a headlock to pull him over, which of course is the exact wrong thing to do.