- See you later, dummy.
- Yeah, in about two weeks when you finally get there.

5 seconds sound clip from the Race for Your Life, Charlie Brown movie soundboard.

You can hear this line at 00:23:41.614 in the DVD version of the movie.

Quote context

[...]

- That round-headed kid is a joke.

- We'll wipe 'em out.

- Attention! Attention! All participants to your rafts.

- How come didn't he say, 'Gentlemen, start your engines?'

- On your marks... Get set... Go!

- See you later, dummy.

- Yeah, in about two weeks when you finally get there.

- What's the matter with the stupid engine?

- Come on! Come on! Let's go!

- I got it! I got it! Let's go! Let's go!

- See you suckers later.

[...]