One Piece Chapter 18, page 8: Buggy, 'The Clown Pirate'

Buggy launches his attack, shouting, 'WINDMILL!!' His detached hand spins the knives rapidly like a propeller, flying straight toward Luffy. Luffy quickly jumps high into the air to dodge the spinning blades, shouting, 'SWING! SWING!' Buggy is surprised by Luffy's agility, noting that he is 'MOVING HERE AND THERE IN THE AIR...!'