Do you hate being crushed in your opponent's side control? Here's something I've been working on in my game that will hopefully help your game. Building a mountain under your opponents crushing side control can give you space and mobility for countering their attacks, and possibly bringing us to a better position.
The underhook is a powerful tool in the hands of an opponent who knows how to use it. They have leverage, control, and setups for numerous takedowns. So how do we stop our opponent from getting the underhooks? With this awesome move from Taijiquan called Fist Under Elbow, and what I like to call Mantis Captures Prey.