This has got to be my imagination, otherwise I'd be scared stiff!
4 seconds sound clip from Scooby-Doo, Where Are You! - Hassle in the Castle (S1E3).
You can hear this line at 00:07:37.517 in the Blu-ray version of the episode.
Quote context
[...]
- Stop that whistling. You make me nervous.
- Uh-oh! Like, which way did they go?
- I'm so scared. I wish I had a ham sandwich to calm my nerves.
- Well, what do you know, a ham sandwich! Wouldn't you know, it needs some mustard.
- This has got to be my imagination, otherwise I'd be scared stiff!
- Now, maybe my imagination can, like, cut it in half.
- Hey, look. Shaggy found Daphne.
[...]