Naruto 30

Kakashi shows his own personal technique, Raikiri (Lightning Edge). Haku begs Naruto to kill him now that he is useless to Zabuza. Naruto is about to avenge Sasuke, but Haku makes a last-second deception and vanishes when he senses that Zabuza is in danger. As Kakashi lands his killing move, he recoils in shock as he sees his hand piercing through Haku’s body. Haku’s final act was saving Zabuza’s life as a human shield.