It was Xmas eve and I was searching for a parking place at a large supermarket. The car park was full. I stopped beside a vehicle and waited for the car to leave, as It's engine was running. The driver appear to take a long time to leave the space. I was becoming frustrated. There was a car behind me sounding it's horn, no doubt in anger as I was blocking his way. Anyway, I got the space. I got the impression that the driver who gave me the car space was spiteful.