I say, what's all this, then?
3 seconds sound clip from The New Adventures of Winnie the Pooh - Nothing But The Tooth / Gone With The Wind (S1E11).
You can hear this line at 00:15:30.000 in the Blu-ray version of the episode.
Quote context
[...]
- I keep mine by my bedside. Easier to keep track of, sonny.
- I've been robbed! Pack rats. They steal you blind, and leave walnuts in exchange. Little varmints.
- And they got your little tooth, too.
- Well, they're not very neat thieves. Perhaps we should follow them?
- You're right, sonny. After them!
- I say, what's all this, then?
- Oh, demolition work, eh? Ha ha. Fascinating.
- Had an aunt once who built a nest in the top of an elevator. But her life was full of ups and downs.
- Oh, I say, this is a pretty bauble. Just what I've been looking for.
[...]