“Suddenly, I heard a noise. It seemed as if something pushed down the wheat. That night the air was completely still. I looked around. The moon had just appeared, shining brightly. In front of my eyes I could see a great imprint taking shape. The wheat was forced down in a clockwise direction.” -Bryce Bond and Arthur Shuttlewood, first modern crop circles witnesses, Warminster, night of August 12, 1972
Along with a great documentary ‘Crop Circles- Quest for the Truth’, a very thorough and detailed article by Freddy Silva explaining the crop circle phenomenon up to the year 2005.