One Piece Chapter 23, page 13-14: Captain Usopp Enters

Panicking, the three kids flee into the woods, screaming, "WAAAA..! WE'VE BEEN FOUND!!" Usopp tries to stop them, yelling, "HEY! YOU... DON'T RUN AWAY!!" but they leave him behind. Luffy, Zoro, and Nami watch blankly as the kids run off. Left alone, Usopp decides to put on a brave face. He stands tall on the cliff, crossing his arms proudly, and bellows, "I AM THE GREAT PIRATE FLEET LEADER, USOPP, WHO IS IN CHARGE OF THE SECURITY OF THIS VILLAGE! I'M ALSO KNOWN AS 'CAPTAIN', 'CAPTAIN USOPP'!

Usopp continues his grand boasting, pointing down at the trio. "IT'S BEST IF YOU DON'T TRY TO ATTACK THIS VILLAGE, BECAUSE MY 80 MILLION MEN ARE NOT GOING TO FORGIVE YOU!" Nami, completely unfazed, smiles slyly and asks, "YOU'RE LYING RIGHT?" Caught off guard, Usopp blunders, screaming, "WAA! I'VE BEEN CAUGHT!" Nami points out, "SEE, YOU EVEN SAID IT YOURSELF!" Usopp clutches his head in embarrassment, crying, "ARGHH!! DID I JUST SAY THAT? BAD PLANNING! BAD PLANNING INDEED!" Luffy bursts out laughing, "HAHAHAHA! YOU'RE SO FUNNY!" Annoyed, Usopp snaps, "HEY! DON'T UNDERESTIMATE ME! I AM A MAN WITH HIGH SELF-ESTEEM! AND EVERYONE CALLS ME THE 'HONORABLE USOPP'!