Maybe he can't find the bubbles.
2 seconds sound clip from The New Adventures of Winnie the Pooh - A Pooh Day Afternoon (S4E3).
You can hear this line at 00:09:31.760 in the Blu-ray version of the episode.
Quote context
[...]
- Where do you think you're going?
- Righto! Being in charge is what tiggers do the best.
- Christopher Robin has been in there a long time.
- Maybe he can't find the bubbles.
- Then this is the perfect time for another bounce!
- I don't know. I believe we're supposed to be watching the dog.
- We'll be right on top of him. You can't do any closer watching than that.
- Well, as long as it's what Christopher Robin wants, then I guess it's okay.
[...]