When in competition, there is nothing more frustrating than an opponent who turtles while you are passing their guard. It robs you of your points, and ends up putting you in a less dominant position.
The guys at Big Guy BJJ have given us a choke option off of the double-under guard pass. It helps stop the turtle, but can also lead to a submission. Once the knee on the neck is in place, whether the opponent rolls back into you or, the choke is often there. This is another high percentage submission for me.
Check it out, and let me know what you think.