Avoiding & Countering Schaedelhau
Avoiding and countering Schaedelhau : Evasion of this vertical strike is about stepping out of the line of attack.
Most important: This must be done at the right time, when your opponent has already started his attack. This exercise is good for feeling proper timing and for coordination of steps and arm movements.
Avoiding is best done when you move your body out of danger of getting hit, while also getting into a good position to counter your foe with a hit.
to watch this video and see this technique explained in detail