This is a simple, and incredibly useful way to submit an opponent who is trying to submit you with a kimura from the bottom of half-guard.
To set the stage: Your opponent has a kimura set up :ohyeah:
Grab your leg, and start to get your kimuraed shoulder towards the ground to stop the lock from being cranked. Reach your other arm through, and grab your kimuraed arm's hand in a monkey grip (thumbs pointing in opposing directions). Try and get your kimuraed shoulder to the ground, and pull up with your other arm.
If done right, your opponent should be (verbally) tapping in short order.