A old chinese martial arts move that rips your heart out. This is the name of the acual move and should be attempted by ammatures. To preforn the Yin Technique your punch has to be at 1067 pounds of force per square inch to break the chest barrier for video of how it performed http://www.spike.com/video/whats-deadliest/3045385
by nocoke4uonlyme January 7, 2009