Movies
It should take you exactly four seconds to cross from here to that door. I’ll give you two.
— Holly Golightly ‧ Breakfast at Tiffany's

Behind the line May contain spoilers.
Our reading
An editorial interpretation.
A cutting bit of mock-precise arithmetic. Crossing to the door should take four seconds, yet the speaker grants only two. It's a stylish way of telling someone to leave quickly, with the exact numbers adding the sting.
Context reviewed