- Say, this new fireworks display's gonna be the best we've ever made.
- I guess it is.

8 seconds sound clip from the You Can't Take It with You (1939) classic radio play.

You can hear this line at 00:15:32 in the radio play.

Quote context

[...]

- Oh, you crazy!

- Sure. And there's one little detail I forgot to mention. I love you, Alice. I love you very much.

- Oh, Tony... Tony...

- There you are. Do you like it, Mr. Sycamore?

- Why, I think it's marvelous!

- Did you make that just the two days you've been here?

- Well, I had the parts, you see.

- But this is a wonderful place to work.

- Say, this new fireworks display's gonna be the best we've ever made.

- I guess it is.

- Did you think a name up for it yet?

- No. What we need is something new and big with plenty of flash.

- You any ideas, Mr. Poppins?

- Er, let me see. Er, I know! The Russian Revolution! Plenty of fireworks there!

- Why, that's brilliant, Mr. Poppins.

[...]