I used to get sudden moments of fear that the 'flash' could happen at that particular moment when it struck. I can vividly remember these happening when I was a teenager.
Looking back it was a terrible thing to grow up with, a constant fear of immediate death without warning.
Somehow while the danger is still present the immediacy of the fear has waned as I have gotten older. Although now I worry about my children it's more of a vague worry about their future than a immediate pressing fear of a the 'flash'.