Movies
I swear, you let me down and it'll take them a month to count the blade marks on your back.
— Kate · The Cutting Edge

Behind the line May contain spoilers.
Our reading
An editorial interpretation.
The speaker warns against being let down through an exaggerated threat about blade marks taking a month to count. The huge timescale makes the menace deliberately extravagant. The line can be read as dark comic pressure, expressing an intense demand without establishing what the speaker will actually do.
Context reviewed