The trigger? One of my riddles, of course.
4 seconds sound clip from the Batman (1966) movie soundboard.
You can hear this line at 00:33:37 in the Blu-ray version of the movie.
Quote context
[...]
- How?
- How?
- The trigger? One of my riddles, of course.
- And the bait? You, Catwoman.
- The minute Batman spots her, he'll bop her with a batarang.
- You don't understand, Joker.
- She will be disguised as Kitka. And as Kitka...
[...]