In standing position, slightly bend your knees and widen your stance.
Hinge at the hips and have a slight bend at the knees. As you squat down, keep your back flat and head neutral. On the way up, drive with the legs and jump from the bottom so you become airborne. As you're mid-air, crunch you abs by bringing your knees and hands together. As you descend brace for the impact by landing gently on the balls of your feet. Return to the starting position and repeat.