One Piece Chapter 9, page 26: Chapter 9: Femme Fatale

Nami explains her actions to Buggy, putting on a show: "I had a dispute with my employer! He's an idiot, so I thought I'd join up with you!" Buggy stares at her in silence for a moment ("Huh?...") before bursting into a loud, booming laugh: "HAHAHAHAHAHAHAHA!!! HA HA HA HA HA HA HA!!" Buggy, thoroughly amused, says, "Idiot, eh? You've got spunk! I think I will let you join my crew!" Meanwhile, Luffy is thrown into a wooden cage, which shuts with a loud "KLANG!!". He grumbles to Nami, "Just forget about joining my crew, now!" Nami turns away with a satisfied smile, thinking to herself, "Infiltration accomplished! Now to grab Buggy's treasure and the map of the Grand Line......and make a quick getaway!!"