Well, there's another hangar check that didn't give us a single new clue.
4 seconds sound clip from Scooby-Doo, Spooky Space Kook (S1E15).
You can hear this line at 00:13:15.486 in the Blu-ray version of the episode.
Quote context
[...]
- You know, Scooby, I think you've given us another good clue to this whole mystery.
- A clue?
- Yeah! Like, how come a ghost from space keeps chicken and ham around?
- Right!
- Zoinks! It's... it's it again! Let's get!
- Trying to make a clean getaway, huh, Scooby? Ha ha ha ha!
- Well, there's another hangar check that didn't give us a single new clue.
- I wish I knew where Shaggy and Scooby were. They're supposed to be helping us.
- I wish I knew where that ghost was.
- Let's keep going. Hold it! There's something in that barrel.
- But what makes those little dots glow?
- That's the same kind of a glow as those strange footprints we saw.
[...]