One afternoon in the late 80s, I was doing a taxi dash to LCY with my American boss to go to the Paris office. LCY was new and traffic from the City was total. I was fretting about missing the flight and he said:
"Sod's Law is in operation. Since there is no urgency to catch this flight [the meeting was the next morning and there were alternative flights] we will make it. If the meeting was this evening and we had no flexibility - then we would miss it."
He was right! We made the flight.