(I work at an amusement park where they have free unlimited drinks throughout the park, a fact that is posted all over the park.)

Me: “Hello, what can I get for you today?”

Customer: “Yeah, how much are your free soft drinks?”

Me: “… I’m sorry?”

Customer: “Are you deaf son!? HOW MUCH ARE YOUR FREE SOFT DRINKS!?”

Me: “Oh, I’m sorry sir. I couldn’t hear you and thought you said something stupid. The free drinks are $5 each.”

Customer: “That’s f***ing highway robbery! You people should be ashamed!”

Me: “Oh, we are…”

Related:
Just Tell ‘Em What They Want To Hear
Just Tell ‘Em What They Want To Hear, Part Two