I thought I heard a noise. I guess my old ears are deceiving me.
4 seconds sound clip from The Ant and the Aardvark (1969) - From Bed to Worse (S1E17).
You can hear this line at 00:02:39.279 in the Blu-ray version of the episode.
Quote context
[...]
- Anteaters only eat ants... and that's an ant.
- Mind your own business, Dog.
- As for you, Ant. I got news for you. Your troubles are over.
- You wouldn't eat an ant with a broken leg, would you?
- Don't worry, the cast will just add roughage.
- What on earth is going on in there?
- I thought I heard a noise. I guess my old ears are deceiving me.
- Quiet! I got enough trouble with nurses. Who needs you?
- You know something? I think he's dead.
- I'm sure I heard a noise this time.
[...]