- What's going on?
- I don't know, but I'm about to find out.

5 seconds sound clip from the American Graffiti movie soundboard.

You can hear this line at 01:33:34 in the Blu-ray version of the movie.

Quote context

[...]

- Just that she was with a really cute guy in a really boss car, and we thought you just might know who it was.

- I'm sorry, but I wouldn't know.

- We know. His name's Bob Falfa.

- Yes?

- Help. No... Bring two Cherry Cokes with lots of ice. No, never mind. Forget... Just bring the ice. Pronto.

- Out. Out. Get out of the car. Hey! Get out. Just get out and shut up. You, too. Get out. Get out!

- What's going on?

- I don't know, but I'm about to find out.

- I can't believe it. You practically get killed trying to get your car back, and then you let him have it.

- It's not my car.

- What?

- It was not my car.

- Well, then, where is your car?

- I don't have a car.

- Well, what about your Jeep?

[...]