This is another great full-body exercise. You'll feel it in your legs, butt, core, back, and shoulders.
The best, most simple description I've found comes to us from Men's Health Magazine:
"Hold a (dumbbell) with two hands, and drop into a squat, then explode upward through your heels until your hips lock in a standing position, the momentum driving the weight up over your head. Then drop into a squat and repeat."
Legal Disclaimer (don't blame me).
Warning - I am NOT a licensed physical trainer, therapist, nutritionist, or a doctor. I am a regular guy who just happens to love exercise and fitness.
Exercise can be dangerous if done incorrectly or in excess. I can't see you, and you can't see me, to know if you're doing an exercise incorrectly, which could lead to injury.
Please Please Please seek help / advice / counsel from a local professional before starting a new program, or before doing an exercise you're unfamiliar with. This information is intended as a guide to point you in the right direction. If you aren't familiar with the exercises described herein, I highly recommend seeking professional advice before trying them.