- What is it? What's going on?
- I don't know, a strange neurosis evidently contagious, an epidemic of mass hysteria. In two weeks it spread all over town.

9 seconds sound clip from the Invasion of the Body Snatchers (1956) movie soundboard.

You can hear this line at 00:15:52.180 in the Blu-ray version of the movie.

Quote context

[...]

- Hello, Dr. Percy.

- This saves me a phone call.

- I've got a mixed up kid and a woman who need a witch doctor. The boy says his father isn't his father, and the woman says her sister isn't her sister?

- That's pretty close. I knew you'd been studying hypnosis, but when did you start reading minds?

- He doesn't have to read them. I've sent him a dozen patients since it started.

- What is it? What's going on?

- I don't know, a strange neurosis evidently contagious, an epidemic of mass hysteria. In two weeks it spread all over town.

- What causes it?

- Worry about what's going on in the world probably.

- Make room for Wilma Lentz tomorrow, will you, Danny?

- Send her in around 2:00. Good night.

- So long, Danny.

[...]