Ready? Wait for it.

4 seconds sound clip from the Kindergarten Cop (1990) movie soundboard.

You can hear this line at 00:48:41 in the Blu-ray version of the movie.

Quote context

[...]

(WHISTLE BLOWING)

- Now, the next time you hear this whistle, each one of you get one toy.

- How many?

- One!

- Good. Then bring it back to the carpet, pronto.

- Ready? Wait for it.

(GIGGLING)

- Wait for it. Sit down.

- Ready?

(WHISTLE BLOWING) (2)

[...]