What can you ever really know of other people's souls? of their temptations, their opportunities, their struggles? One soul in the whole of creation you do know: and it is the only one whose fate is placed in your hands. If there is a God, you are, in a sense, alone with Him.
A car crash harnesses elements of eroticism, aggression, desire, speed, drama, kinesthetic factors, the stylizing of motion, consumer goods, status -- all these in one event. I myself see the car crash as a tremendous sexual event really: a liberation of human and machine libido (if there is such a thing).