To start this power movement, rest the bar on your upper chest with a grip around shoulder width apart.
Once you are in the proper starting position bend your knees and drive the weight overhead using the momentum of your leg drive.
Once the bar is just over your head, lock your elbows out and bring your head through so that the bar is above your head at the top of the movement.
As you lower the bar, do so in a controlled manner all the way down until the bar is resting on your chest. Reset and start the second repetition.