- 'The Philosophy of Time Travel.' What is this?
- She wrote it.

8 seconds sound clip from the Donnie Darko movie soundboard.

You can hear this line at 01:10:52 in the Blu-ray version of the movie.

Quote context

[...]

- It's amazing. The man thinks he's telling the truth and everything he says is just a fucking lie! Everything he says!

- Everyone thinks he's so rad. He's such a fucking chud. Everything he does...

- Are you okay? Sit down. Calm down.

- You ever hear of Grandma Death?

- Who?

- 'The Philosophy of Time Travel.' What is this?

- She wrote it.

- I'm... I've been seeing stuff. Like, a lot of really messed up stuff. And there are chapters in that book that describe the stuff I've been seeing. It can't just be a coincidence.

(KNOCKING ON DOOR)

(DOORBELL RINGS)

- She's gotta be in here somewhere. She never leaves this house.

- Well, maybe she's asleep.

[...]