One Piece Chapter 41, page 10: To the Sea

With a massive "DOSUUN!!" crash, Usopp slams face-first into the ground right in front of Luffy and Zoro. He lies there groaning, "...... TH... THANK... YOU..." to which Luffy casually replies, "NO PROBLEM." Kaya walks over and asks softly, "SO YOU ARE GOING TO THE SEA..." Usopp sits up and says, "YEAH. I HAVE TO GO BEFORE I CHANGE MY MIND. PLEASE DON'T STOP ME." Kaya smiles gently and says, "I WON'T... I'VE FIGURED THAT YOU MIGHT DO THIS. IT REALLY MAKES ME SAD THOUGH."