One Piece Chapter 6, page 16-18: Chapter 6: Number One

Morgan slowly pushes himself back up, his face contorted with rage. He growls, "BOY..." and raises his massive axe-hand once more, declaring, "I SENTENCE YOU TO DEATH!" He swings the giant blade down with a powerful "WHWNK!" and "FWOOSH!", but Luffy quickly dodges the strike, keeping his distance.

Luffy relentlessly pummels Captain Morgan, landing a barrage of punches right to his face with a loud "KA-WACK!" sound effect. He declares firmly, "I'M NOT GONNA DIE." Morgan is sent flying backward from the sheer force of the blows. Koby and the Marines watch in absolute disbelief, with Koby shouting, "HE'S JUST TOO STRONG!!" while the Marines cry out, "CAPTAIN MORGAN... HE'S GETTING PUMMELED!!

Luffy grabs Morgan by his collar, preparing to finish him off, and yells, "YOU AND YOUR NAVY... ARE RUINING KOBY'S DREAM!" Suddenly, a voice interrupts the battle, screaming, "STOP!! I SAID STOP, YOU IDIOT!!" Luffy and Zoro pause and look over in surprise to see what is happening.