They may be a totally random paths, created by excess of electric charge, who tried to get away from there, more or less randomly, and are often very tortuous.
Maaari silang maging isang lubos na random na path, nilikha ng labis ng electric singil, SINO ang mga klase upang makakuha ng layo mula doon, higit pa o mas mababa random, at Kadalasan napaka paikut-ikot.