One Piece Chapter 15, page 17: Chapter 15: GONG

Luffy's rubber body stretches under the force of the Buggy Ball, making a "GGNNN...!!" sound. Buggy is flabbergasted, stammering, "WHAT THE HECK IS THAT GUY?!" Cabaji and the animal-eared man watch in disbelief as Cabaji notes, "HE TOOK A DIRECT HIT FROM A BUGGY BALL!" With a loud "BOINNG!!" and "WOOOO" sound, Luffy bounces the cannonball right back toward Buggy's tower. Nami gasps, "AND HE BOUNCED IT BACK!" Zoro remarks, "YOU COULD HAVE AT LEAST TOLD US WHAT YOU WERE PLANNING..."