- A fan? Really? Ahem, I mean, really?
- Sure!

6 seconds sound clip from the Darkwing Duck - Darkly Dawns the Duck: Part 1 (S01E01) movie soundboard.

You can hear this line at 00:10:08.745 in the DVD version of the TV Series.

Quote context

[...]

- Clever of me to use my spine to break my fall like that.

- Hold it right there, ya pirate!

- No, no, no! I'm a...

- Nobody but nobody messes with the airplanes in my hangar, or my name isn't Launchpad McQuack.

- You don't understand! I am not a thief! I am...

- Darkwing Duck!

- You know me?

- Know you? I'm your biggest fan!

- A fan? Really? Ahem, I mean, really?

- Sure!

- What are you doin' here?

- Oh, just another stopover in my never-ending fight against...

- Hey, you're a pilot! We can use this plane to catch those crooks.

- Ho-ho! I got something a lot better than this plane.

- No time. Get in. We have evildoers to thwart.

[...]