One Piece Chapter 22, page 6-8: YOU ARE A RARE AND PRECIOUS ANIMAL TOO

Luffy grabs a snake with long rabbit ears, calling it a weird rabbit, while Nami points out that it is actually a mutant snake. Next, they spot a large pig with a lion's mane, which Luffy mistakes for a lion. Nami comments on how bizarre the forest is. Suddenly, a booming voice echoes through the trees, warning them to stay back and get out. Luffy and Nami look around in confusion as the voice introduces itself as the forest guardian.

The mysterious voice demands to know if they are pirates. When Luffy cheerfully confirms they are, the voice orders them to leave immediately or face the "forest judgement." Luffy dismisses the threat and walks forward, trying to locate the speaker. The voice warns him again, shouting, "Receive the forest judgement!

A loud gunshot rings out, and a bullet strikes Luffy directly in the chest. Nami screams in terror, but Luffy's rubber body simply stretches to absorb the impact before snapping back and sending the bullet flying harmlessly away. Nami is amazed to see that bullets do not hurt him. The hidden shooter gasps in shock, asking what kind of creature Luffy is, to which Luffy retorts that that is their line.