Because of the good grip that I have made against you, I will not fail to break your arm over my left shoulder. And then, I will wound you with your own dagger, and this play will not fail me.
With your opponent attempting an overhead strike, you make the cover of the 1st master. Keeping your left hand open, with the palm up, strike to the inside of the wrist of your attackers right hand with the hook at the base of your thumb. Keep your elbow in and do not overextend your arm. The most dangerous part of this play is the potential to drive your hand against the tip of the incoming dagger. Take care to move under it.
The instant you make contact, roll your right hand over, grabbing the wrist. Keeping your forearm at 45 degrees and your hand at shoulder height, pull your elbow back into your core so that it rests gently against your ribs.
Keeping your left elbow still, move your hand in an anticlockwise circle in front of you. At the bottom of the circle reach across with your right hand. At this point, your left hand should be palm up, and your right, palm down. Grab onto your opponents forearm and start the upswing of the circle.
As the hands start to lift, pivot on your left foot and arc your right foot behind you. Turn 180 degrees and slide your left shoulder gently under your opponents elbow. Your opponents right hand should now be palm up and their elbow locked.
Up until this point, all your movements have been soft, circular and flowing. You now suddenly shift to linear movement. Brace your legs, straighten your back and keep your elbows in. While you push up with your shoulder, forcefully pull both your hands down to your right hip.
With a loud crack, your opponents elbow will be ripped apart. The dagger will fly from their hand as the picture demonstrates. You are free to leave it where t falls or pick it up and use it to finish off your opponent. Whatever you choose to do, your opponent will be in a world of pain, completely unable to prevent it.
A similar elbow break across the shoulder appears in the following.