"I don't know anyone who grew up in the 1970s who wasn't scarred by the public information safety films on British TV. Those tiny, doom-filled dramas slipped in between the cartoons were often only fifteen or thirty seconds long but, by God, they caught our attention. Don't play with matches, or old fridges. Or kites or frisbees, should you happen to be near a pylon or electricity substation. Be careful crossing the road and running along the beach...