Thank you for the information about the book. This is my experience it may be different than yours. I agree you are not going to knock someone out with a snap punch. I was taught to jump or step forward and snap punch. Pivoting the foot and moving the hips and reverse punch. Body positions when punch is made makes a difference in the power of the punch. example: is he running into your punch or away from your punch. I have broken a guy's nose stepping backwards panting my feet while he was moving forwards with a snap punch. I have broken a board with my body stationary with a snap punch. So I believe some power can be generated without body movement.