In his book Boxing, the best instructional book ever written on the subject, Edwin L Haislet says that the 'swing' has no place in the arsenal of a skillful boxer. I subscribe to that belief as well. There is no 'textbook' way to throw a "hooking jab" because you don't...You create those angles that enable you to get around an opponent's defense with feints and by moving your feet, not by throwing a corkscrewing, knuckleball jab.