the dragon king did as he was bid , and the warrior noticed that he had only three arrows left in his quiver . he took the bow , and fitting an arrow to the notch , took careful aim and let fly . the arrow hit the centipede right in the middle of its head , but instead of penetrating , it glanced off harmless and fell to the ground . nothing daunted , hidesato took another arrow , fitted it to the notch of the bow and let fly . again the arrow hit the mark , it struck the centipede right in the middle of its head , only to glance off and fall to the ground . the centipede was invulnerable to weapons ! when the dragon king saw that even this brave warrior 's arrows were powerless to kill the centipede , he lost heart and began to tremble with fear . then suddenly the warrior remembered that he had heard that human saliva was deadly to centipedes . but this was no ordinary centipede . this was so monstrous that even to think of such a creature made one creep with horror . hidesato determined to try his last chance . so taking his last arrow and first putting the end of it in his mouth , he fitted the notch to his bow , took careful aim once more and let fly . 
it will hurt the centipede .
how will the last arrow affect the centipede differently from the first two ?
how will the last arrow affect the centipede differently from the first two ?