"After a long drive, I went straight to the petrol station, taking advantage of the cheap evening price, and refuelled the car. Then I drove for about another kilometre until I reached home. The next morning the car didn't start! It was towed to the workshop. They called and asked what type of fuel I had put in the tank. It suddenly became crystal clear, and the workshop's preliminary diagnosis was confirmed - I chose petrol instead of diesel. It's so silly, but I have always warned everyone throughout my professional life:: Pay attention when refuelling!"