The mechanism of a gun is to gather all the force of the body into one point. The human body's power comes from its legs. With the contraction of muscles, Darren's military boots turned slightly, gripping the ground like nails.,"This is very simple, just need to gather all your strength into one point, you can easily do it.",Jia Ji stood with a pose he thought was cool, taking a deep breath under the watchful eyes of everyone.。