I was in Sydney (Australia, not Nova Scotia) some years ago and walked into a store apparently run by an Asian lady. I took something to the counter to buy and tried to make light jokey conversation with her. She seemed somewhat nonplussed—she clearly wasn't used to that kind of thing from customers. Then she asked, "You American?" Because really, who else but an American would be so bold and brazen? And I could sense in a microsecond that it would be suboptimal if she thought I were, so thinking fast for a change, I replied, "ah, Canadian actually." And she smiled and said, "ahhh, Canadian, good!"
It wasn't complete cosplaying on my part. I did grow up in north Windsor, and I did take a Canada History course at Michigan State as an elective. Got a 3.0, too.