Naruto's Ninja Handbook

The headbutt heard across the valley: with chakra spent and limbs pinned, Naruto closes the last centimeters with his forehead, cracking the sand and Gaara's certainty in the same blow. What follows is the fight's real exchange — two empty boys crawling toward each other on willpower, and Naruto explaining, between gasps, why he fights: the people who saved him from exactly Gaara's hell are behind him, and he will not let that be taken. Gaara, bleeding and baffled, hears the first argument he cannot kill.