This information was originally published on jiu-jitsu.net. It is made available on BJJ.Org by the express permission of featured contributor Gene "Aranha" Simco.

1. In this situation, I have my opponent in the north/south position.

2. I control his arm as shown, grabbing his left arm with my right hand, coming under his arm with my left and grabbing my own wrist.

3. I finish by bringing his arm to a 90 degree angle and twisting to the right as shown to put pressure on his shoulder.