- Mmm. You mad, impetuous thing. It's champagne.
- Not exactly. Sparkling muscatel. One of the finest wines of Idaho.

11 seconds sound clip from the The Muppet Movie (1979) movie soundboard.

You can hear this line at 00:50:06.654 in the Blu-ray version of the movie.

Quote context

[...]

- Oh. Wow. Good evening, Miss Piggy. You look lovely tonight.

- Thank you.

- I'm so sorry if I kept you waiting.

- Oh, it... It was worth it.

- How charming of vous.

- I... I took the liberty of ordering us some wine.

- Mmm!

- Oh, waiter.

- Yes? May I help you?

- The... The wine, please.

- Mmm. You mad, impetuous thing. It's champagne.

- Not exactly. Sparkling muscatel. One of the finest wines of Idaho.

- Well, you may serve us now, please.

- Oh, may I?

- Look how he does that.

- Yep. Very suave.

- Mmm.

- Don't you want to smell the bottle cap?

- Oh. Mmm-hmm. Smells good.

- Mmm. Yes.

- Would you like to taste it first?

- Well...

- I think he's supposed to.

- Would you taste it for us, please?

[...]