34 But David persisted. “I have been taking care of my father’s sheep and goats,” he said. “When a lion or a bear comes to steal a lamb from the flock, 35 I go after it with a club and rescue the lamb from its mouth. If the animal turns on me, I catch it by the jaw and club it to death. 36 I have done this to both lions and bears, and I’ll do it to this pagan Philistine, too, for he has defied the armies of the living God! 37 The Lord who rescued me from the claws of the lion and the bear will rescue me from this Philistine!” Saul finally consented. “All right, go ahead,” he said. “And may the Lord be with you!” 1 Samuel 17:34-37 NLT

So what is the correlation to Kyusho you may again be asking, well it was a premeditated attack against a weaker anatomical structure. The tool in this case was as the Bible states a "Smooth Stone" that struck Goliath, and actually killed him. David also quickly decapitated or beheaded him with his own sword after he fell. So as the Giant fell from the stone hitting his forehead, the blunt trauma would strike with such Kinetic force so as to cause concussion cerebral edema and also unconsciousness at the least. But the beheading not only made sure of the death, it also served as a message to the army behind him that all fled in fear.

Blunt transfers more kinetic energy (over a wider expanse), into the brain for longer time as the lack of an edge to deflect the mass on impact .

See the other knockouts and learn how to do them in the extended film - running time 21 Minutes

#Kyusho -ep