"Insert your right knee between
Uke's left knee and elbow. Using your right knee, knock away
Uke's elbow, forcing Uke flat onto the mat with his left arm
outstretched. 
Seize
Uke's left wrist with both hands and swing into a sitting
position, resting your weight against Uke's shoulder. To bring
preasure onto the elbow joint, push down with your right armpit
on Uke's upper arm and lever the forearm up in the opposite
direction."
