Somebody left half a hamburger.
2 seconds sound clip from Scooby-Doo, Where Are You! - Never Ape an Ape Man (S1E7).
You can hear this line at 00:07:22.741 in the Blu-ray version of the episode.
Quote context
[...]
- Did you know that this set is built on the ruins of the original old mansion?
- Zooks! There should be some good clue-hunting around here.
- Well, what are we waiting for? Let's search.
- Keep a sharp lookout for anything that will give us a clue.
- Hey, Scooby, what's that you found?
- Somebody left half a hamburger.
- Hunting clues always makes me hungry.
- Don't eat that clue, Shaggy!
- See those claw marks? The Ape Man was eating this sandwich.
- That's odd. Apes don't eat meat.
- Maybe this Ape Man is more than an ape.
- It's OK, Shaggy. You can eat it.
- What? Me eat after an ape? I can't do it.
[...]