Woo hoo hoo! This is the only way to fly, Pooh Boy!
3 seconds sound clip from The New Adventures of Winnie the Pooh - A Pooh Day Afternoon (S4E3).
You can hear this line at 00:08:48.859 in the Blu-ray version of the episode.
Quote context
[...]
- Hmm. One lap around the yard can't hurt.
- Come on, Pooh Boy, let's go for a little doggyback ride.
- Good thing you guys aren't very heavy, or the dog couldn't carry you.
- Are you sure you don't want to come along, Piglet? You aren't very heavy, either.
- If I have to see this dog, I'd rather do it from where he can't see me.
- Woo hoo hoo! This is the only way to fly, Pooh Boy!
- Why not? It's the only thing this dog knows how to do.
[...]