Jack was in a supermarket, doing some shopping. He was feeling tired after a workweek and was looking forward to spending the Saturday relaxing in front of the TV, watching a football match and drinking a few beers. He was twenty-three years old and lived alone in a fairly quiet town. He didn't have many friends, but he liked to spend most of his time alone, so he didn't mind it too much. He had a steady job at a logistic...