Next, blink and snap your head and grab your thighs, bring your left hand up in front of your left armpit, and make your right open palm go directly into the attacker's chin. (Moving your hand directly avoids the telegraphic move of raising your hands up before striking.) Focus on penetrating the target three inches and quickly whip your right hand back. You will also bend your knees and lean into your strike.
The hand coming toward your armpit increases the rotational speed that started with your head snap. Using rotational speed gives you the advantage of both maximum quickness and maximum power together, once you're able to do F.A.S.T. as one move.
Keep in mind that your left hand has a shorter distance to reach your armpit, but you must make your right hand strike the attacker at almost the same time. This means that your right hand must move even more explosively than your left. (This movement sends a shockwave through your arm to deliver extreme power.)
Stomach Crunch—In this step, start from a relaxed ready position, explosively crunch your stomach to make your upper body rotate slightly left, and tilt toward the attacker. Do this step 10 times. Next, blink your eyes, snap your head, bring your left hand up, make your right open palm go into the attacker's chin, bend your knees, and lean toward the attacker using the explosive stomach crunch. Quickly return to your starting position. Practice this step 10 times. (Notice how energy is moving through your body toward the attacker for more power.)
Tramp Your Foot—Step closer to the attacker, forcefully tramping (stamping) your foot down. Keep a shoulder-width stance for better balance and a shorter reaction time for your next move.