What's that? Sounds like the midnight express... Yow! It is!
— Shaggy Rogers (Casey Kasem)
8 seconds sound clip from Scooby-Doo, Where Are You! - Decoy for a Dognapper (S1E5).
You can hear this line at 00:10:34.239 in the Blu-ray version of the episode.
Quote context
[...]
- Hang on, Scooby! We'll save you!
- Hurry, Freddy! Give her the gas!
- One for the money, two for the show, three to get ready, and here I go!
- As soon as we slow down, Scooby, I'll get you out of that crate.
- What's that? Sounds like the midnight express... Yow! It is!
- I hope this is the brake! It's rusty. It's not holding.
- Here they come! That train is awfully close!
- There was a switch by the crossroad. Come on! Let's go!
- Scooby, you're a brave decoy.
- Did those old dognappers hurt you, Scooby?
[...]