One Piece Chapter 5, page 15: CHAPTER 5: THE KING OF THE PIRATES AND THE MASTER SWORDSMAN

The flashback ends, returning to the present courtyard. Zoro, facing the firing squad, thinks, "I CAN'T DIE YET!! I PROMISED HER!" Captain Morgan commands, "FIRE!!!" Just as the Marines are about to shoot, Luffy launches himself out of the base window using his rubber powers, shouting, "GUM-GUM... ROCKET!!!" and crashes down into the courtyard.