One Piece Chapter 1, page 30: Romance Dawn

Higuma pulls Luffy's cheek, stretching it out like rubber: "Eh, rubber boy? There sure are some weird creatures in the world..." Luffy struggles, yelling: "You jerk! You'd better take it back!!!" Higuma slams Luffy onto the ground and steps on his head: "Oof!" Higuma chuckles: "I've discovered a new life form... Maybe I'll sell you to a freak show... I bet they'll pay good money for you." Luffy growls: "Darn you!!! I'll make you so sorry for this!!"