One Piece Chapter 51, page 18: Roronoa Zoro Falls Into the Sea

Zoro turns around to face Mihawk, spreading his arms wide open and exposing his chest. Mihawk is surprised, asking, "What...?" Zoro smiles calmly and says, "A wound on one's back, is the shame of a swordsman." Mihawk smiles back, saying, "Splendid," and slashes Zoro across the chest with his massive Black Sword. Luffy screams in absolute horror, "ZORO!"