The mice were blown away, sucked down dark air shafts to their deaths. All, except two: Jonathan and Mr. Ages.
20 seconds sound clip from the The Secret of NIMH (1982) movie soundboard.
You can hear this line at 00:53:22.711 in the Blu-ray version of the movie.
Quote context
[...]
- 20 rats and 11 mice were given injections.
- Then, one night, I looked upon the words under the cage door and understood them.
- We had become intelligent. We could read.
- We were trapped by a locked door on the roof.
- It was Jonathan who made possible the unlocking of the door.
- I have a gift. Come. Jonathan meant it for you.
- Sleeps?
- Yes.
[...]