Three men were arguing about the meaning of "sang-froid".
The first one said, "Suppose I come home from work early one afternoon and find my wife in a liaison with another man. I would say to them 'Excuse me.' That would be sang-froid."
"I somewhat agree," said the second man, "but I would say to them, 'Excuse me, please continue.' That would show real sang-froid."
Finally, the third man, with an amused smile on his face, spoke up and said, "I have a totally different perspective than you do. I would say to them, 'Excuse me, please continue.' If he did, he would have sang-froid!"
A+, I love a good story.