App 1: Chulgi's 'double punch' applied as a blow to the back or side of the opponent's neckApp 2: Chulgi's 'punch-across-body' applied as a blow to the side of the opponent's neck.When does your arm travel across the body in Taekwondo? Well, below black belt you've got the ol' Tea Cup Saucer position in Won-hyo, the tension press open palm 'block' and double augmented block in Yul-gok, the punch-across-the-body in Joon-gun, and the punch into the fist and the side punches-across-the-body in Hwa-rang.I was not happy with the standard explanation of the punches across the body. Some of what I saw showed demos of double punches landing at the same time, some showed short range punches, and others tried to explain it with kyusho or some other esoteric explanation. What I like about the two apps above are the simplicity of the movement, the ruthlessness of the technique, and the elegant way in which they resolve the movement and tie in with each other. Aside from these, I have space in my heart for explanations that include elbows to ribs, joint hyper-extensions, and some escapes (but not all).I could never swallow explanations for short punches because the reverse snap punch which is a very powerful strike should be the primary weapon of choice for any short range encounter that required a strike at mid level. Why would I choose a less powerful weapon when all I needed to do was to turn my body and fire off a reverse punch?