godinmycorner i also used to jab and sort of duck my head to the right to avoid counters on my jab i think it is a good little adjustment to keep them from using the overhand right or simply trying to intercept your jab with their own ive heared of this little adjustment be referd to as a ''classic block'' but i have now come to realise it hass its own set of problems like many manouvers in boxing, it tends to leave you in a bad place leaving your rear foot out behind dropping you into a wide stance often with nowhere to go if your in a hurry, aswell it makes you a prime target for a counter uppercut and aswell it just makes your balance a bit too much on the front foot, thats just my opinion of it yes its a good thing to do if your opponent is trying to counter you with these 2 counters and to take them away from him, but dont get too reliant on it because a good boxer will find its weakness and your in quite a vulnerable place when doing this if you think about it.