It's a vat of sulfuric acid. Ooh. How horrendous.

6 seconds sound clip from Batman (1966) - Hizzonner the Penguin (S2E17) TV Series.

You can hear this line at 00:23:06 in the Blu-ray version of the movie.

Quote context

[...]

- All right, Batman. Enough with the fancy umbrella play.

- Since you're so eager to discuss the weighty issues in the campaign, we've fixed up a little surprise for you.

- Well, Batman, it looks like the Penguin put the election on ice, huh?

- What's going on here? This is outrageous. How dare you threaten the life of a political candidate? That's an outrage, I say. Oh. An outrage.

- Look at that. As the ice melts... Batman and Robin will sink lower and lower into this vat.

- It's a vat of sulfuric acid. Ooh. How horrendous.

- I intend to summon the police this very instant.

- Uh... Oh, dear me. I seem to have run out of dimes. Quack! How tragic.

- Well, don't fear, Batman. I shall run to the police station myself.

- If I hurry, I should be there in three or four hours at the most, hmm?

[...]