- Do you know what you're doing?
- What we're doing. Come on.

6 seconds sound clip from the Grease (1978) movie soundboard.

You can hear this line at 01:01:06 in the Blu-ray version of the movie.

Quote context

[...]

- Get serious.

- It's a suggestion.

- I already called him.

(CAR APPROACHING)

- Relax. I think our luck is changing.

- Do you know what you're doing?

- What we're doing. Come on.

- Hey, Marty, you're looking good.

- Could you just excuse me one second?

- You're feeling good too, huh?

- Sonny, there he is! Look. That's Vince Fontaine.

[...]