Many Crop Circles (but also many cases of flattened (damaged, weakened) crop) probably created by double exposure – the first discharge plants only "prepares", creates "sensitive layer" of weakened plants, which are much more sensitive to any mechanical and physical stimuli, and to them records the next discharge yet, which occurs after a few weeks or months.
Maraming crop lupon (ngunit din maraming mga kaso ng pipi (nasira, Weakened) crop) Malamang na nilikha sa pamamagitan ng pag-double na pagkakalantad - ang unang naglalabas halaman lamang "naghahanda" Lumilikha "sensitive layer" ng Weakened halaman, Aling mga mas sensitive sa anumang mechanical at pisikal na stimuli, at magtatala sa susunod kanila pagdidiskarga pa, Aling nangyayari pagkatapos ng ilang linggo o buwan.