During only hundred millionths of a second, what is the time during that is radiated power of the vast part of subsequent lightning stroke - more 99%, is the column of air edge moving "only" sound velocity, to a distance 30 mm. Electromagnetic radiation from the subsequent electric discharge moved at the same time to a distance of 30 km, and that rays, propagating in all directions, may be within such a column about 300 - 30000 (depending on the angle) times bounced and create many sorts of resonance and interference effects.
Habang lamang daang millionths ng isang segundo, ano ang oras sa panahon na radiated kapangyarihan ng ang malawak na bahagi ng kasunod na kidlat stroke - mas 99%, ay ang haligi ng hangin paglipat ng "lamang" bilis ng tunog, sa isang mm distance 30.