Shaggy? Scooby? They were right behind me, but now they're gone.
4 seconds sound clip from Scooby-Doo, Where Are You! - A Gaggle of Galloping Ghosts (S1E11).
You can hear this line at 00:13:13.318 in the Blu-ray version of the episode.
Quote context
[...]
- Speaking of escaping, let's get out of here.
- Man, this is, like, dark in this tunnel.
- I can hardly see even with my glasses.
- Now, stay close together. It's getting darker.
- Isn't that a crack of light up ahead? Yes, it is.
- Shaggy, you'd better lead from now on.
- Shaggy? Scooby? They were right behind me, but now they're gone.
- We found Daphne in a dungeon.
- I wrote down a message written on the dungeon wall in 1668. It says...
- I have fooled them all, I may perish, but I'll be as rich as King Tut!
[...]