Roald Dahl was driving out in the country when he had an idea about a child and a chocolate factory. He had no paper in the car, and so he simply wrote the word "Elevator" in the dust that had settled on the car. He had forgotten the story entirely until he looked at the car a few days letter and saw his message to himself.
Yes Robin, don't ever buy novelty condoms from a man with green hair and a purple suit...