for me,its when a video made by an american,uses weight measurments in lbs(pounds) and talks of speed in kilometers per hour,maybe in old school but in the uk we use miles per hour for speed and kilograms for weight,why the hell is this so common for yank documentries to do this?,it sends hy head in a spin and benifits no one,anyone else pissed off with this too?
But it's you who are weird!
Why on earth would you use speed in mph?
What I sorely hate is the "re-Imperialisation by stealth" that has occurred in Oz.
We have people who would have been far too young to have been taught Imperial measures saying "About an inch", or whatever.
Another one is the propensity to sell beer in "Pints".
"Pints" as a beer measure had disppeared into the distant mists of history, well before I came of drinking age, with the Aussie standard drink sizes being variously, the "Glass", "Middy", "Pot", Schooner, etc.
All of these were defined in Imperial measures, but with Metrification, were redefined in Metric terms.
Everything was fine for a while, until a few places started selling "Pints" to snotty little "trendoids" who liked to pretend they were in London.
Unfortunately, it took off & spread like a Pandemic, till you are battling to get a Middy or Schooner anywhere!
To add insult to injury, some of the "Pints" are the wimply little US version, not the full hairy chested Brit one!
Yet another, when we Metricated, many of us were happy to say goodbye to Whitworth, UNF, BSF & BA threads, but go into any big Hardware store today, & you will find most of the shelf full of Whitworth & UNF bolts & nuts with Metric a poor cousin.
India produces an avalanche of good quality, but cheap, Imperial screws, & for most home hardware type jobs it doesn't matter, so the shops are just maximising their profit.
It still makes me go "Aaarrrrgggghhhh!", though.