Leaving the zoo quickly after entering with 〜てから

Grammar Explanation: After doing with 〜てから

While trying to find something to do, Sacchan and her friends pass by the zoo, which is free for children to enter. Yui asks if Sacchan plans to enter the zoo.

さっちゃん:: 「動物園(どうぶつえん)史上(しじょう)一番(いちばん)早(はや)く入(はい)ってから出(で)てくる」; "The fastest in zoo history to enter and then leave."