A rabbit. I knew it all along.
3 seconds sound clip from the The Secret of NIMH (1982) movie soundboard.
You can hear this line at 00:10:02.894 in the Blu-ray version of the movie.
Quote context
[...]
- Well, of all the silly nincompoops. You got yourself all worked up over a rabbit.
- You should've seen yourself.
- A rabbit. I knew it all along.
- Oh, fiddlesticks. Hold still.
[...]