Road rage
I have decided that the world can be grouped into two kinds of people.
Those who just go to the petrol station, quickly fill up, pay and leave.
And those who go to the petrol station, ease themselves slowly out of the car, slowly put on a little pair of plastic gloves and then fill up their tank until it's overflowing (by squeezing the pump in little bursts for ages, ooh Freud would have a field day) and then slowly screwing on the cap, removing the gloves, reaching back into their car for their wallet. Ambling across the forecourt and then mooching round the shop for a while deciding which chocolate bar to have, before finally paying and slowly wandering back out to their car, where they get back in and check their teeth in the rear view mirror and have a little conversation with their passenger before driving off.