There he goes, flying across the sky.
3 seconds sound clip from Scooby-Doo, Where Are You! - That's Snow Ghost (S1E17).
You can hear this line at 00:05:52.066 in the Blu-ray version of the episode.
Quote context
[...]
- I want to find out about our mysterious guest.
- Oh, boy! This ski trip's turning into a real scare trip.
- Boy, that Snow Ghost sure gets around.
- The tracks end at the edge of this chasm.
- Well, if he tried to walk across, the first step is a doozie!
- There he goes, flying across the sky.
- He disappeared behind those trees.
- And that's where we're going. Come on!
- Look. There's a cave with a light coming from it.
- Maybe that's where he lives.
- Well, there's only one way to find out.
[...]