- Hey! What's with him?
- Yeah, what's with you, Scooby Doo?
4 seconds sound clip from Scooby-Doo, Where Are You! - The Backstage Rag (S1E9).
You can hear this line at 00:07:29.011 in the Blu-ray version of the episode.
Quote context
[...]
- No. Sorry, chum, but you can't work this show unless you're a puppet.
- You're very good. Are you a puppet master?
- Oh, my, no. I just fiddle with them as a hobby.
- Well, you certainly seem professional.
- Well, why not? The great Pietro has helped me.
- Yeah, what's with you, Scooby Doo?
- A witch? I get it. One of the puppets scared you. OK. Let me up.
- That's OK. I'll go put Johnny away.
- Look what I got... a brand-new bill, just like in the violin case!
[...]