One Piece Chapter 22, page 23: YOU ARE A RARE AND PRECIOUS ANIMAL TOO

Luffy reaches the top of the hill and confirms that there are indeed five treasure chests. Gaimon is overjoyed and begs Luffy to throw them down, warning him not to hit him. However, Luffy flatly refuses, saying, "No way!" Gaimon and Nami are shocked, and Nami furiously demands that he stop joking around and drop the chests.