(I am a student in Sweden and I just finished making a transaction for a nice Japanese couple at a tourist center. Another tourist comes up.)

Me, in Swedish: “Can I help you?”

Customer, in English: “Sure, can you tell me about…” *mumbles*

Me, in English: “Can you repeat that, please?”

Customer: “Shut up! Don’t you dare mock me! You can’t speak American, you Chino!”

Me: “I’m Russian.”

Customer: “Well, you still can’t speak American!”

Me: “I was raised in the UK. And it’s called English.”

Customer: *storms out*

Boss: “What the f*** was that about?!”