- You're kidding, aren't you?
- I'm not kidding.

2 seconds sound clip from the Network (1976) movie soundboard.

You can hear this line at 00:31:19.069 in the Blu-ray version of the movie.

Quote context

[...]

- They want Howard to go on spontaneously letting out his anger.

- A latter-day prophet denouncing the hypocrisies of our times.

- Hey, that sounds pretty good!

- Who's this they?

- Hackett. Chaney was there. The Legal Affairs guy. Oh, and that girl from Programming.

- Christensen? What's she got to do with this?

- You're kidding, aren't you?

- I'm not kidding.

- I told them. I said: Look, we're running a news department, not a circus.

- And Howard Beale's not a bearded lady.

- And if you think I'm gonna go along with this bastardization of the news, you can have my resignation along with Max Schumacher's right now.

- And I think I'm speaking for Howard Beale and everybody else down there at news.

[...]