My car broke down today!
Why is that good news? Because it was showing all the signs of Tesco petrol poisoning, and my mechanic was having difficulty in locating the part it would have needed. On inspection it turns out to be the coil!
(Mind you if it had been the other problem, Tesco had agreed to pay for a hire car as I have to have a car for my job - so it's not quite good news!)