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Comic strip of a ghost and a person with the American flag pasted on the head. The ghost repeats “Boo!” in the first three panels without getting any reaction, but when it in the fourth panel says “kg, cm, km, °C” the American gets scared and screams “AHHHH!!!”.
Edit: fixed alt text
This one wouldn’t make sense as they say dates as month day, year.
To me, dates should always be written in international format: YYYY-MM-DD