Okay, in "Brazil" the goon squad has just crashed through the ceiling, thrown a heavy, filthy canvas sack (& straight jacket) over the the victim's head, pulled a chain around his neck, and as they are carrying out the wiggling man, a goon with a clipboard says to the woman in the apartment, "Please sign here..." The woman upstairs says something like,"Wait, there's been some sort of mistake!..." The goons in the apartment in the level above the victim's apartment, are about to plug up the hole they blasted through the ceiling with some kind of standardized goon squad entryway ceiling plug patch kit. The worker says, "Mistakes? heh-heh, We don't make mistakes." (that's not the line yet) The workers move the plug into the opening...and... it falls right through crashing into some stuff in the apartment below. (wait for it)
The worker then says, "Bloody typical!; They must have gone back to metric without telling us!" (that's the line)
Now I wish I could achieve that level of concise-itude. That single sentence implies the following,
1. Being England, they started off with English units.
2. At some point they adopted metric units. Okay, that was an actual thing...but it wouldn't be going BACK to metric.
3. It further implies that they had a period when they had stopped using the metric system that they had previously adopted, and that they went over to something else (maybe back to English units, or perhaps some exotic standard that some bureaucrats had invented).
4. And FINALLY they went BACK to metric!
This implies at the very least THREE reversals, and the way they acted, they seemed as though this thing had happened often enough before that they recognized the cause of the problem!