I used to train with a guy who was a phenomenal amateur. He basically mastered the pull-back, and was so damn hard to hit. I try to incorporate this in my own technique, but I admit it's an advanced technique that requires a lot of practice and good reflexes. It works beautifully if you can do it. Otherwise, don't try it in a real fight until you've gotten real good at it.
We used to train with a kid called Angel Hernandez who went on to challenge Chavez Sr for the belt. He was an accomplished pull back guy. Tall, quick reflexes and all that. One day, my trainer says to me, 'aim behind his head' when you get him on the ropes. Go to the body first, then shoot that left hook behind his head. Well, needless to say, he kept leaning back right into my hook. Lucky for him, I'm not a huge puncher. If not, he'd still be laid out. So, I can tell you from first hand experience what the old skool trainers told their fighters. "Don't pull the f*ck back from punches".
Knower days we use something called the hook block,,,when in guard simply push the elbow forward to block the hook :deal
