My mom has raised me to be a sarcastic child, and every now and again her biting humor rears its heads in public situations. For example:

When she was younger, she worked at a postal store and could therefore sell books of stamps. As most people know, this is not a real book. However, here is a typical transaction:

Customer: I would like a book of stamps.
Mother: Paperback or hardback?
Customer: Ah...is hardback more expensive?
Mother: Nope.
Customer: Then hardback.

In her youth, my mother also worked at Macys, and at some point did something to throw out her neck, meaning she had to wear an enormous neck brace at work. Here is a typical exchange with customers:

Customer: Oh my! What happened to you?
Mother: I broke my leg.
Customer: (sincerely) I'm so sorry.

Today, she received a call from a department store. She can be a bit forgetful when it comes to payments and as such, gets calls from the store reminding her to pay her balance.

Representative: May I ask why you didn't pay your balance on time?
Mother: Yes.
Representative: And may I ask why you didn't pay your balance on time?
Mother: Yes. Yes, you may.
Representative: So may I ask why you didn't pay your balance on time?
Mother: Yes. Yes you may ask me.
Representative: May I ask why you didn't pay your balance on time?
Mother: Yes. Yes, you may ask me why I didn't pay my balance on time.
Representative: So then may I ask you why you didn't pay your balance on time.

I am not sure how the exchange ended, but my mother said the representative never did directly ask her why.