- If nothing happens by morning, call the police. If something happens call me, will you?
- You know I will.

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

You can hear this line at 00:23:39.635 in the Blu-ray version of the movie.

Quote context

[...]

- She thinks that her uncle and her aunt aren't her uncle and her aunt.

- There's several cases of such delusion.

- Now this isn't you yet, but there is a structural likeness.

- It's fantastic, but there must be some reason why this thing is in your house.

- Would you be willing to sit up with your strange friend, and see what his next move is?

- If nothing happens by morning, call the police. If something happens call me, will you?

- You know I will.

- Good night. Take it easy.

- Sure.

- Now nothing's going to happen.

- Good night.

- Well, if it does it'll make a charming, bloodcurdling mystery story.

- I was careful not to let Becky know, but for the first time I was really scared.

- Dan Kauffman's explanation of what was wrong in town - mass hysteria, couldn't explain away that body on Jack's billiard table.

[...]