Oh, no, another door!
2 seconds sound clip from Scooby-Doo, Spooky Space Kook (S1E15).
You can hear this line at 00:14:50.861 in the Blu-ray version of the episode.
Quote context
[...]
- We got to sneak past Mr. Creepy and find Freddy and the girls. Come on.
- Quick, Scooby, put this key in a safe place.
- Old frightenin' face won't be able to open the door now.
- Oh, no! It opened the other way!
- Yikes!
- Quick, Scoob, give me the key!
- The key?
- You threw it out the window?
- We got to get that key and get out of here!
- Got it. Now we can get out of here.
- I'm getting worried. We haven't seen hide nor long hair of Shaggy or Scooby.
[...]