As already indicated on the page Lightning, or many subpages, Lightning discharges do not need really "work too much", to make something like that. "Sticks" to the land at 100 - 200 thousand kilometers per second, and within a few microseconds may transmit such an amount of energy, sufficient to drive several electric locomotives for many hours. As will be over time apparent from an accompanying images located here, in many locations where the discharge lightning hits, really creates something like that. "A little" confused explorers of Crop Circles slightly unfortunately attribute their creation as "people-made" - stuck pole, string, etc.
Kama tayari unahitajika umeme kwenye ukurasa, au subpages wengi, umeme yanayovuja haja ya "kazi sana" kwa kweli kufanya kitu kama hicho. "Vijiti" kwa ardhi katika kilomita 100-200,000 kwa pili, na Ndani microseconds chache wanaweza kuambukiza ukame wa kiasi cha nishati, kadhaa kutosha kuendesha injini ya umeme kwa saa nyingi.