One Piece Chapter 18, page 13: Buggy, 'The Clown Pirate'

Buggy's separated lower body crashes heavily into a building behind Luffy, completely demolishing it with a loud 'GASHAA' sound effect. Buggy laughs mockingly, 'KUHAHAHAHAHA. YOU'RE NOT MUCH OF A THREAT, GOMU GOMU...' Luffy stands amidst the flying debris, looking back in surprise and shouting, 'HEY!'