The Two Awaken! On The Front Lines ... — (dub) 185 :

While on board, Sanji also manages to sabotage the Ark Maxim’s internal gears, momentarily stalling Enel’s plans for the destruction of Skypiea.

Sanji arrives at the last second, taking a massive electrical shock from Enel head-on. He famously asks for a "light" for his cigarette after being charred by the lightning, buying enough time for Nami and Usopp to escape the ship safely. (Dub) 185 : The Two Awaken! On the Front Lines ...

You can watch this episode on platforms like Crunchyroll or Apple TV . While on board, Sanji also manages to sabotage