One Piece Chapter 1.1, page 35: Romance Dawn (Version 1)

Gyari's pirates throw the tied-up Luffy off the pier. Luffy splashes into the deep ocean. Gyari watches from the pier, muttering, "AN ANNOYING BASTARD EVEN TIL DEATH.". Luffy sinks rapidly into the dark water, unable to swim. He cries out in frustration and grief, thinking, "DAMN...!! EVEN THOUGH IT'S THE HAT I PROMISED TO RETURN...!! HE SMASHED IT!!! I WON'T FORGIVE THAT GUY!!! SMASHING MY TREASURE!!!". As he sinks, he remembers Shanks' smiling face and his promise: "COME AND RETURN IT SOME DAY. IT'S MY TREASURED HAT."