Two women are standing in line to pay their bill at a restaurant. As soon as it's their turn, they hand the young waitress a credit card.
After swiping the card, she loudly called out to her manager, "Mr. Andrews, what do I do if it says 'rejected'?"
As the women's faces reddened and customers turned to look, Mr. Andrews walked out from the kitchen.
"Well," he answered, wiping his hands, "the first thing you DON'T do is shout it out loud enough to embarrass the customer, who might have been thinking of leaving you a tip."