http://mabufs.i2p/goon-fu/shaolin-qian
The arm is too straight - there is no strength left to return, and if a strong opponent grabs it, he can do harm; if the arm is too bent - it may not reach the target. Shaolin fisting requires the coordinated use of the three inner coordinations (heart and thought, thought and qi, qi and strength) and the three outer coordinations (hands and feet, elbows and knees, shoulders and hips).