During a flood in a small town, a young girl was perched on top of a house with a little boy. As they sat watching articles float by in the water, they noticed an old hat go past. Suddenly, the hat turned and came back, then turned around and went downstream. After it had gone some distance, again it turned and came back. They watched as it did this a number of times". Do you see that hat?" said the girl in amazement. "First it goes downstream, then turns around and comes back, then it goes back downstream and then it comes back again". "Oh it isn't that amazing, it's only my dad," replied the boy. "This morning my Mum said that come hell or high water, he had to mow the lawn today".