The first person on the scene to this newly (rainy overnight) crafted crop circle in 2008 noted that he had become mud-covered waist high. Everywhere he had trod had made a mess of the nearby barley, yet every millimeter of the barley stalks involved in the crop circle had remained pristine through its being made. There were no tracks of any kind, and no mud on the pattern, just uniformly and neatly bent stalks.
The concentric circles are in twelve sections. (2x6 system, as are our clocks, compasses, etc.) If one starts at the (later-inserted red arrow), there are 3 1/12th sections clockwise, then a 90-degree outward cut, with a dot (for a decimal point), then a single 1/12th section, then 4, then 1, etc., representing ultimately the number 3.141592654, which is π out to 9 decimal places.
The contention is that at least some crop circles could in no way have been constructed by humans: