Toilet bowls having so much water in them.
American breadsticks being like small baguettes instead of crunchy, slim things.
The way TV show timings are displayed as stuff like "8/7c".
The lack of electric kettles everywhere.
That playing sport in high school is a Big Deal, and can even get you uni scholarships.
And that college-level sports have such a big fanbase.
The massive gaps in public bathroom stalls.
High school graduations in general.
All biscuits being called cookies.
And scones being called biscuits, and eaten with a white gravy.
Washing machines having their own room.
Tax not being included in prices.
The order of dates by month, day, year.
Plugs not having an on and off switch.
Chocolate advent calendars not being a Christmas staple.
Or big chocolate Easter eggs.
The fact people don't drink squash.
Teabags not being very popular, because a lot of tea is actually iced.
And the biggest mindfuck of all, American lemonade being still rather than fizzy.