Well I was just looking out in the sky one thundering night and was just wondering whar is the cause of the flashy sound when lightning does occur. Is it the sound that is generated when the Dielectric breaks down??? If so why?? Or is it that when lightning strikes the friction between the two clouds are at their highest level so therefore the sound generated then is most. If this is so then what is the cause of maximum friction only when lightning strikes? Well i may be speaking in very vague terms but just to add, I was looking out in the sky one thundering night when my vacations were on.