What in tarnation could be keeping...
3 seconds sound clip from The New Adventures of Winnie the Pooh - Cloud, Cloud Go Away / To Dream the Impossible Scheme (S4E7).
You can hear this line at 00:15:10.283 in the Blu-ray version of the episode.
Quote context
[...]
- Let's hear it for the most stupendous master builder of all time!
- Uh, just a moment, if you please. We're waiting for Gopher's grandfather to arrive.
- Oh. You would not happen to be that gopher, would you?
- Yep.
- Well, then we're waiting for you. It's very exciting, isn't it? You should be here any moment now.
- What in tarnation could be keeping...
- Grandpappy! Is it really you?
- Yep.
- Uh, did you have trouble finding the place?
- Nope.
- Yes, sir! That's my grandpappy! He's a gopher of few words.
- Sounds like a gopher of two words.
- Well, let's roll out those blueprints and start building right away.
[...]