Those of you who daily deal with the public one-on-one will appreciate these gems.
Here's an example:
[i](I work in healthcare and am talking to a man in his fifties who is having angina for the first time.)
Me: "You haven't had a heart attack, but this pain is probably coming from your heart."
Man: "But I'm only 50-something and there are no heart problems in my family. Why would that be?"
Me: "You smoke 30 a day and drink 2 cartons beer a week. That's not good for your heart. You should think about cutting down."
Man: "I'm sick of you people telling me that bulls***! It's a scientifically proven fact that smoking makes your arteries smaller, and drinking makes them bigger! If I keep drinking AND smoking, I'll be fine!"
Me: "That's not at all how it works, but I see I'm not going to change your mind. You'll be going upstairs soon."
Man: "I want to go out for a smoke!"
Me: "That's really not a good idea..."
Man: "What would you know?!"
Me: gives up[/i]