For someone who can stand up, defending against a knife attack is relatively simple. You think of your forearm as a two-by-four. You extend it downward or upward and catch the attacker's forearm with your forearm. Then you pinwheel that two-by-four of yours, use it to redirect the attacker's momentum up and away, in and away, or down and away. At the same time you step out of the way. This enables you to prepare for the next slash or stab. Or better still, since you've probably exposed their side or back by maneuvering them away, you have the chance to beat the hell out of your opponent.

If you're in close or underneath your attacker, you still use your forearm for defense. Only now you bend your arm at the elbow first. Forming a "V," you catch the attacking arm firmly with your forearm. Retaining forearm-to-forearm contact you redirect the arm up, down, or to the side, just as you did with a straight-arm defense. The only difference is that you must block closer to your wrist than to your elbow. Otherwise the knife may slide down your forearm, slip under the elbow, and stab you.

Because Manfred was bringing his arm down, with his full weight behind the knife, Bob Herbert had to bend his elbow to stop him. He raised his left arm up, his forearm across his upturned forehead, his fist tight to strengthen the arm. As he met and stopped the attacking arm, he hit Manfred's exposed jaw with a hard right jab. The raging German barely seemed affected by the blow. He drew his blocked arm back, cocked it to his right, and slashed toward the left, toward Herbert's chest.

Herbert dropped his left forearm, made a "V," and blocked again. Somewhere behind him he heard Jody scream. But Herbert was too focused, too determined to keep the brute away to tell her to run. More soldiers died in hand-to-hand combat because they were distracted than because they didn't know what to do.

This time, Manfred refused to be stopped. Though his arm was blocked, he bent his wrist. His hand moved as if it were independent of the rest of him. He pointed the blade toward Herbert, the knife-edge pressing against his flesh. Herbert was one second away from having his wrist slashed.

He bought himself another second by pushing his left arm toward Manfred to relieve the pressure. While Manfred adjusted to put the knife back in position, Herbert reached his free right hand over his blocking left. Grabbing the knife hand, he dug his thumb between Manfred's tight thumb and index finger and wrapped the rest of his fingers around Manfred's fist. Dropping his blocking forearm to get it out of the way, he twisted Manfred's fist clockwise, hard and fast.