Luffy finally shows up together with his formed alliance from the escaped prisoners of Impel Down. As they were looking upon the scaffolding where Ace is, Crocodile has set off to attack Whitebeard soon as he had the chance, but Luffy caught up to his scheme intercepting Crocodile with Gear Second and with his body soaked wet. Crocodile then realizes Luffy already knew his weakness and therefore he had no choice but to give it up. As for the first time, Luffy stands face-to-face with the World's Strongest Man. Showing interest towards the boy, Whitebeard then asks Luffy if he knew what he is against with. Luffy stood up refusing to be told what to do, showing little manners, he competes with Whitebeard even telling the old man that the next pirate king would be him. Everyone was shocked by Luffy's actions towards Whitebeard, but later on, the two of them agreed not to get in each other's way and do it as they please. (thetvdb.com)