It's all too easy to get caught up in your own personal conversations when out to eat, just as it's all too easy for your server to overhear what you have to say. And sometimes it might have better been left private, as these servers dish on the most shocking and WTF things they've ever heard customers say.
"I was bringing a check for a wealthy local businessman who was dining with his girlfriend. It was a big tab, and I was already counting the tip when the woman hurled his drink in his face and yelled to an aghast room of people, 'YOU DIDN'T EVEN PAY FOR THE ABORTION!!!' and stormed out. The man calmly brushed the ice off his suit and looking around said, 'Not the first time. Won't be the last.' I wheeled off and gave him the bill later" (Source).