In addition to these points, relaxation to achieve superior snap, and various timing is developed in relation to the punch and propulsion of the stance. This eventually takes the technique away from being `merely oi-zuki’ (I.e - a subtle change in timing can easily turn it into oi-komi gyaku-zuki etc). Keeping the hips in hanmi, only rotating strongly into shomen at the end (timed with the stance completion, hiki-te etc) is the most powerful method. However, timing 'the movement and the arm' is hardest to defend against. All types must be practiced and employed according to the situation.