Another application drill for chest block (chudan uke). Here, we are examining the windup and chest-block motion as striking the back of the neck, grabbing the chin/face, and pealing the head back to expose a target for the hammer fist (face, side of head, or throat). Various possible follow up techniques--here, we are practicing the hammer fist and knee strike. This drill is a bit more challenging for beginners, but my students eventually caught on and had fun training it. Hope you can use it or modify it for your own students.