Peanuts, my boy, mere peanuts. That bar job was just a pot boiling appetizer for the real feast.

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

You can hear this line at 00:15:21 in the Blu-ray version of the movie.

Quote context

[...]

- You're welcome, sir.

- Boys and girls, go back to your studies. Believe me, nothing in life is free!

- Scarcely, 500 yards away behind this innocent seeming candy store, an abandoned garage, now headquarters of The Joker and his current gang, the Bad Pennies.

- High school dropouts, most of them.

- It's a pretty good haul, isn't it?

- Peanuts, my boy, mere peanuts. That bar job was just a pot boiling appetizer for the real feast.

- Oh-ho-ho! What an inspired stroke of mind... buying up the One-Armed Bandit Novelty Company.

- Plunder by remote control.

- Hey, Joker, I think I got this one rigged. Come and have a look.

- Put it all away.

- Right.

[...]