They got the message. Here comes Freddy and the girls.
3 seconds sound clip from Scooby-Doo, Spooky Space Kook (S1E15).
You can hear this line at 00:18:08.406 in the Blu-ray version of the episode.
Quote context
[...]
- We'd better get Freddy and the girls up here on the double.
- They must have found something up in the tower. Let's go!
- I hope we're not too late. Look!
- They got the message. Here comes Freddy and the girls.
- Look!
- Uh-oh! Here comes Mr. Trouble, too.
- Those chairs aren't gonna keep him out of here, Scooby. We'd better think of something else.
- Parachute? Only as a last resort. A very last resort.
- We're too late. That ghost has gotten to Shaggy and Scooby first.
[...]