Twelve and one half minutes later inside this curious vehicle...

7 seconds sound clip from Batman (1966) - The Joker Goes to School (S1E15) TV Series.

You can hear this line at 00:22:08 in the Blu-ray version of the movie.

Quote context

[...]

- Wait, Batman, look, a machine. It's been tampered with.

- This might be tricky. Get out your Bat-a-rang. I'll slip in a dime.

- Holy ball and chain!

- Quick! Let's get out our cutting tools.

- The knock-out gas.

- Twelve and one half minutes later inside this curious vehicle...

- It's all hooked up, boys. 50,000 volts, straight from the city main.

- Good!

- Gosh, Joker, this sure is some crazy mixed-up moving van.

- One of the assets of the One-Armed Bandit Novelty Company built for a whimsical Caribbean dictator. Happily for us, if not for the Dynamic Duo. Uh, deposed before delivery.

- Oh, they're waking up.

[...]