Stand directly behind your opponent. Wrap your arms around her midsection; above her hips and below her rib cage.
Secure your opponent using a butterfly lock. Wrap your left hand up and over your right forearm, grabbing across the forearm with your entire palm. Slide your right hand along the bottom edge of your left forearm and grasp the forearm as close to your left elbow as possible.
Lift your opponent off the ground. Bend your knees to lower you hips below your opponent's rear end. Thrust your hips up into his body and lean back while maintaining a solid butterfly lock.
Set your hips for stability and power. Imagine you are sitting into a chair behind you as you lose your balance falling backward, lowering your hips and rear end into a deep squat.
Arch your back forcefully as your thighs become parallel with the ground. Simultaneously raise your butterfly-locked arms up and over your head while pushing off the mat using the balls of your feet and toes. Your goal is to make your opponent's back land before your shoulders.
Finish in a neck bridge or back arch position. Continue to thrust your hips and arch your back until you cannot continue any further. Your opponent will absorb the impact, landing on her neck, shoulders or head.