“Here is Edward Bear, coming downstairs, bump, bump, on the back of his head, behind Christopher Robin. It is, as far as he knows, the only way of coming downstairs, but sometimes he feels that there really is another way, if only he could stop bumping for a moment and think of it.”
Milne, A. A., The Complete Tales of Winnie-the-Pooh. 1926. Penguin USA, Oct. 1996, as quoted by Dr. David A. Cook and Theron R. Leishman in their paper Lessons Learned From Software Engineering Consulting.