- I'd say you were doing something pretty dangerous this time.
- Yeah?
- Mixing fact and fiction.

7 seconds sound clip from the The Third Man (1949) movie soundboard.

You can hear this line at 00:52:56.675 in the Blu-ray version of the movie.

Quote context

[...]

- I said, where would you put Mr James Joyce? In what category?

- Can I ask, is Mr Martins engaged on a new book?

- Yes. It's called The Third Man.

- A novel, Mr Martins?

- It's a murder story. I've just started it. It's based on fact.

- Why, it's Mr Popescu! Oh, very great pleasure to see you here, Mr Popescu. As you know, ladies and gentlemen, Mr Popescu is a very great supporter of one of our medical charities.

- Are you a slow writer, Mr Martins?

- Not when I get interested.

- I'd say you were doing something pretty dangerous this time.

- Yeah?

- Mixing fact and fiction.

- Should I make it all fact?

- Why, no. I'd say stick to fiction. Straight fiction.

- I'm too far along with the book, Mr Popescu.

- Haven't you ever scrapped a book, Mr Martins?

- Never.

- Pity.

- Ladies and gentlemen, if there are no more questions for Mr Martins, I think I can call the meeting officially closed.

[...]