That's just the trouble. I can't fly.
6 seconds sound clip from The Yogi Bear Show - High Fly Guy (1958) - S01E08 TV Series.
You can hear this line at 00:02:03 in the Blu-ray version of the movie.
Quote context
[...]
- Oops!
- Hey, mom, wait! Mom! I can't fly!
- What's the trouble, little fly guy?
- That's just the trouble. I can't fly.
- Dry your eyes, little bitty birdie.
- Your pal Yogi will teach you how to fly.
- Abso-one-hundred-percent-lutely.
- I've been watching birds do it for years.
[...]