And ever since then, no one's ever dared to go into the swamp.
4 seconds sound clip from Scooby-Doo, Where Are You! - Which Witch Is Which (S1E13).
You can hear this line at 00:03:56.107 in the Blu-ray version of the episode.
Quote context
[...]
- You mean, there's a witch living in that swamp, too?
- Yep. She showed up about 6 months ago.
- Smoke of darkness, demon of evil, take the form of the living and come forth from the flame!
- And ever since then, no one's ever dared to go into the swamp.
- Like, wow! No wonder this town is deserted.
- Yep. Zeb and me are the only ones left, and he's so scared, he won't leave his cabin.
- I've never heard of such a thing.
- Oh, no! Scooby ate some jumping beans by mistake.
[...]