One Piece: Season 1, Episode 414

All-Out Special Power Battle!! Gum-Gum vs. Snake-Snake

Luffy activates Gear Second and is currently taking the lead. When Boa Marigold unleashes a fire technique which Luffy dodges and burns Sandersonia's clothes, Luffy appears to be their lifesaver and said that their backs has nothing to do with their fight. Boa Hancock evacuates everyone in the arena in risk of them seeing the "Gorgon Eyes".