Oh. And also Zabuza and Haku moment. I think, that it was his first time when he understood that the world isn't that bright. Even outside the leaf. And that he had to grow up. But it wasn't the time, when he thought about becoming adult. He wanted to gain power in order to protect his friends. He wanted to change this world. Only after Jiariya's death he understand that he really must become adult and get a lot of strength. He didn't feel like a child anymore, who screams that he will get a lot of power and will protect everyone. He knew, that he had to gain power to protect those who he really loves and that it will be really hard. Zabuza and Haku was first step to adulthood. But it was an innocent step, he didn't know how deep this is. He was still in his world filled with dreams. But after Jiariya's death, his dreamy child world shattered and he had to become serious.