- You saw somebody else dressed like me?
- Yeah! Yeah!
- Let's get out of here!

— Shaggy Rogers (Casey Kasem)

6 seconds sound clip from Scooby-Doo, Where Are You! - The Backstage Rag (S1E9).

You can hear this line at 00:13:46.518 in the Blu-ray version of the episode.

Quote context

[...]

- Hey, Scooby, check this. Pretty heroic, huh?

- Hee hee hee! Yeah! Yeah!

- Watch this. Grr!

- Ha ha ha! That's great! Hold it a sec. Aha! The Cloaked Cavalier!

- That's a doozie! Hee hee hee! Huh?

- Uh-oh. There were rwo of you.

- There were two of me? I don't get it, Scoob. Huh?

- Rwo of you.

- You saw somebody else dressed like me?

- Yeah! Yeah!

- Let's get out of here!

- I wish I knew what we were looking for.

- We'll know when we find it.

- Yeah, if we find it.

- Hey, Daphne, Velma, come over here.

- I saw him! He was in that prompter's box!

- Run! Get out of here! There's a guy in a black cape running around!

- Yeah! Yeah!

[...]