One Piece Chapter 11, page 10: Chapter 11: FLIGHT

Luffy suddenly turns his head and yells to Zoro, "ZOLO!! RUN!!!" Zoro is startled, uttering a confused "HUH!?" Nami is also shocked, shouting, "WHAT? I'M NOT GOING ANYWHERE! WE'RE TRYING TO SAVE YOU!" Luffy explains, "THEY'LL KILL YOU THE MOMENT WE GO!" Zoro looks at Luffy, smiles, and says, "OH... GOTCHA..." as a realization hits him.