I was working drive through at McDonald's in the early 2000's and this old guy pulls up to my window. I say (as an Australian in an Australian drive through) "G'day mate, what can I get you?"
Well this guy loses his shit, flies into a rant about how I'm not his mate and he doesn't even know me and how dare I presume to be his mate. I say "I'm sorry, it's just a turn of phrase, what can I get you?"
He continues to rant and demands to see my manager. So I say sure, close the window and mosey on over to my manager and explain my situation. He looks a little bewildered but says "no stress I'll deal with it, just wait round the corner."
He walks into my booth andi hear him say "G'day MATE, what can I get for you?" The guy loses his brains for a few more minutes at the audacity. To which my manager says "I understand, what can I get you?" The guy finally orders and we all moved on with our lives.