Vuly Thunder Pro Manual page 8

Arm Actions
Arms are also important for proper lift and control. Whenever
you're in the air, your arms should be too. Raise them as
you jump – to about shoulder height and width. Keep this
position until you start falling, then lower your arms to slightly
behind the hips. Re-lift them as you bounce again.
Leg Actions
There are three basic leg actions: the tuck, pike, and straddle
pike. You should assume these positions at the peak of your
bounce, and resume the normal landing position as you
come back down.
Concentrate on getting perfect form as you practice;
ensure that your toes are pointed, and your fingers are
straight. These simple variations to the basic bounce are
very important for gaining experience in coordinating your
movement.
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