You'd better get started or you'll be late.
3 seconds sound clip from the Strange Brew (1983) movie soundboard.
You can hear this line at 00:41:47 in the Blu-ray version of the movie.
Quote context
[...]
- Hey, Rosie. We're going to Pam's birthday. You coming?
- It's a business trip. They're going on a business trip.
- Okay, so we just go down to Lakeside Park here, eh?
- You'd better get started or you'll be late.
- No, you open the door. Open the door.
- Open the door. Come ahead, boys.
[...]