Looks like we're up against a very smart bear.
5 seconds sound clip from the Hey There, It's Yogi Bear (1964) movie soundboard.
You can hear this line at 00:21:45 in the Blu-ray version of the movie.
Quote context
[...]
- I don't understand it. We're snowed under with complaints.
- Raids on ice boxes, meat taken out of sandwiches.
- And we can't blame Yogi. He's been gone a week.
- Everyone blames the Brown Phantom, sir.
- Brown Phantom, my eye. It's one of the bears.
- Looks like we're up against a very smart bear.
- And right now... he's out there somewhere, swiping something.
- I strike through the air. I'm a swinging bear. Yay!
- Oh! It's a bear. A bear in the ice box. Oh! A bear in the ice box. A bear in the ice box!
- Now it's bears in the ice box!
[...]