I'm sure you recognize this as a variation of the legendary Chinese water torture.
7 seconds sound clip from Batman (1966) - The Cat's Meow (S2E29) TV Series.
You can hear this line at 00:22:57 in the Blu-ray version of the movie.
Quote context
[...]
- And don't bother looking for your utility belt. I've had it burned. Ha-ha-ha!
- I'm sure you recognize this as a variation of the legendary Chinese water torture.
- When I throw that switch, the noise will become excruciating. And your eardrums will be shattered.
- Shortly following that, your brains will be turned into yuch.
- And then I shall return... And then you can be mine forever, Batman.
- True, I'll have to sacrifice your intellect. Oh, well, with a build like yours, who cares?
- After all, one can't have one's cake and eat it too. Heh. Ta-ta.
[...]