of the opponent's leg. He catches and lifts the heel/foot of the planted leg with his rear hand and with the front arm goes under the knee of the kicking leg, hooks it with the nook of his elbow, and lifts while advancing to throw the opponent backward. The athlete executing the counter has to lean forward to avoid hand strikes by the opponent. This counter is shown on a Panathenaic amphora now in Leiden. In another counter, the athlete sidesteps, but now to the outside of the oncoming kick and grasps the inside of the kicking leg from behind the knee with his front hand (overhand grip) and pulls up, which tends to unbalance the opponent so that he falls backward as the athlete advances. The back hand can be used for striking the opponent while he is preoccupied maintaining his balance. Locking techniques Arm locks Arm locks can be performed in many different situations using many different techniques. Single shoulder lock (overextension) The athlete is behind the opponent and has him leaning down, with the right knee of the opponent on the ground. The athlete has the opponent's right arm straightened out and extended maximally backward at the shoulder joint. With the opponent's right arm across his own torso, the athlete uses his left hand to keep the pressure on the opponent's right arm by grabbing and pressing down on it just above the wrist. The right hand of the athlete is pressing down at the (side of) the head of the opponent, thus not permitting him to rotate to his right to relieve the pressure on his shoulder. As the opponent could escape by lowering himself closer to the ground and rolling, the athlete steps with his left leg over the left leg of the opponent and wraps his foot around the ankle of the opponent stepping on his instep, while pushing his body weight on the back of the opponent. Single arm bar (elbow lock) In this technique, the position of the bodies is very similar to the one described just above. The athlete executing the technique is standing over his opponent's back, while the latter is down on his right knee. The left leg of the athlete is straddling the left thigh of the opponent—the left knee of the opponent is not on the floor—and is trapping the left foot of the opponent by stepping