I like the sound of that.
4 seconds sound clip from the Back to the Future movie soundboard.
You can hear this line at 00:40:58 in the Blu-ray version of the movie.
Quote context
[...]
- A colored mayor. That'll be the day.
- You wait and see, Mr. Caruthers. I will be mayor.
- I'll be the most powerful man in Hill Valley, and I'm going to clean up this town.
- Good. You can start by sweeping the floor.
- Dad!
[...]