(While waiting at the self-checkout tills, I overhear this conversation.)

Customer #1: “This bloody till won’t work! Why won’t it scan my coupons?”

(At this, an employee appears to help.)

Employee: “Here we are, ma’am. You just put your coupons in this slot here and it should work.”

(Suddenly, a middle-aged woman with a young daughter who are using another self-checkout pipes up.)

Customer #2: *to Customer #1* “Excuse me, could you please refrain from using language like that in public? I don’t want my daughter picking up bad habits”.

Customer #1: “Oh, of course!” *to Customer #2′s daughter* “I’m sorry, sweetie. Never ever use the word you heard me use just now…”

Customer #2: “Thanks!”

(Customer #2 smiles and gets back to scanning her items, but Customer #1 isn’t done speaking.)

Customer #1: “…unless you’re really f***ed off, that is!”