One Piece Chapter 1, page 23: Romance Dawn

You think it's funny?! He made you look like a weakling!!! Why didn't you fight him?! Sure, they outnumbered you, and maybe they looked pretty tough, but what kind of man lets himself be treated like that then laughs about it? You're a disgrace to all pirates!" Shanks tries to calm him down: "When you grow up maybe you'll understand, kid. He just got some grog on me, that's all. Needless killing doesn't make you a man." Luffy yells: "Hmph! To go find a real role model!" and storms off. Shanks grabs his arm to stop him.