When I was a boy, my father told me to bang my head against a rock and I did it. I thought it was crazy, but I didn't question him. And you know what happened? That rock split in two.

Stoick The Vast (Gerard Butler)

14 seconds sound clip from the How to Train Your Dragon movie soundboard.

You can hear this line at 00:10:48 in the Blu-ray version of the movie.

Quote context

[...]

- You don't know that.

- I do know that, actually.

- No, you don't.

- No, actually, I do.

- No, you don't.

- Listen, you know what he's like. From the time he could crawl, he's been different.

- He doesn't listen. He has the attention span of a sparrow.

- I take him fishing and he goes hunting for trolls!

- Trolls exist. They steal your socks. But only the left ones. What's with that?

- When I was a boy, my father told me to bang my head against a rock and I did it. I thought it was crazy, but I didn't question him. And you know what happened? That rock split in two.

- It taught me what a Viking could do. He could crush mountains, level forests, tame seas!

- Even as a boy, I knew what I was, what I had to become.

- Hiccup is not that boy.

- You can't stop him. You can only prepare him.

[...]