One Piece Chapter 2, page 4-5: THEY CALL HIM "STRAW HAT LUFFY"

Koby walks dejectedly along the shore of the island, sighing. He spots a large wooden barrel washed up on the beach. Three of Alvida's crewmen—a tall slender pirate with parted hair, a muscular pirate with a goatee, and a stocky bearded pirate—approach him. The goateed pirate asks, "WHAT'S THAT, KOBY? DID A BARREL OF RUM WASH UP ON THE BEACH?" Koby replies, "Y-YEAH. AND IT'S NOT EMPTY! I WASN'T SURE WHAT TO DO WITH IT..." The slender pirate suggests, "WELL I KNOW WHAT TO DO WITH IT! LET'S DRINK IT ALL UP!" The bearded pirate worries, "BUT IF THE CAPTAIN FINDS OUT, SHE'LL HAVE OUR HEADS!" The slender pirate dismisses this, saying, "SHE'LL NEVER FIND OUT! WE'RE THE ONLY ONES HERE. JUST KOBY AND THE THREE OF US KNOW ABOUT THIS. I GUESS YOU'RE RIGHT." The bearded pirate growls at Koby, "AND YOU AIN'T SEEN NOTHIN', RIGHT, KOBY?" Koby nervously waves his hands, pleading, "RIGHT! I-I AIN'T SEEN NOTHIN'! HEH HEH HEH. PLEASE DON'T HIT ME...

As the pirates prepare to open the barrel, it suddenly bursts apart with a massive explosion of wood. Monkey D. Luffy pops out, stretching his arms wide and shouting, "THAT WAS A GREAT NAP!!!" The pirates are thrown back in absolute shock, crying, "WHAT THE DEVIL!?" Luffy laughs heartily, "I GOT SO DIZZY I THOUGHT I WAS GONNA BARF!! HAHAHAHA!" He looks down at the broken pieces of the barrel and remarks, "HMM... LOOKS LIKE I SURVIVED SOMEHOW.