One Piece Chapter 38, page 17-19: PIRATE FLEET

The pirates desperately beg Kuro for mercy, shouting, "CA... CAPTAIN KURO!! IF I GO BACK TO SEA I WON'T TELL ANYONE YOU'RE STILL ALIVE, SO PLEASE LET ME LIVE!!!" and "I WON'T TELL ANYONE EITHER, CAPTAIN KURO! JUST SPARE ME!!!" Luffy asks, "WHAT ARE THEY TALKING ABOUT? HE'S JUST SWAYING THERE..." Suddenly, Kuro vanishes with a massive burst of speed as the technique "SHAKUSHI" is unleashed.

The slope falls completely silent. Meanwhile, Nami walks up the path, complaining, "AH... HOW DISAPPOINTING... I THOUGHT THERE WOULD BE A LOT OF TREASURE. HMMM... IS THE BATTLE OVER ALREADY?" She stops as she notices everyone standing completely still, wondering, "...WHY IS EVERYONE STANDING STILL... IS IT OVER...?

Suddenly, invisible slashes rip through the air, striking the pirates and the ground. The pirates scream in agony: "UWAAAAAAAHH!!!" and "YAAAH!!!" Luffy is shocked, shouting, "WHAT'S HAPPENING?!!" as the rocks and ground are sliced up around them.