This ghost really doesn't need any introduction. As soon as we clean him up... I'm sure you'll recognize him. There. Look familiar?
8 seconds sound clip from Scooby-Doo, Where Are You! - What the Hex Going On (S1E6).
You can hear this line at 00:19:53.884 in the Blu-ray version of the episode.
Quote context
[...]
- Well, Miss Sharon, I still have you, and the fortune shall yet be mi...
- How did that get here? Let me out of here!
- Golly, he's running like a ghost was after him.
- I guess that about wraps up the ghost story.
- He thought he could scare you into giving up the family fortune.
- That ghostly wailing was only a recording.
- And by a clever use of makeup, he made himself look old.
- When I came downstairs to investigate a noise, I saw Uncle Stuart's wig blow off.
[...]