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Alan K: Wow, what a story.
Intense thunder & lightning scares me (while commuting).
I haven't experienced it yet, fortunately. But ...
You are right, one does not forget! I remember the strike on a nearby tall, industrial electricity mast; white sparks like fireworks in all directions.
The danger lies not only in the point of impact but also the surrounding environment (including the ground).
Another danger, less severe but still, is the chilling during a sudden and particular hailstorm. I have seen unprepared people truly defeated and become hail zombies, so to speak.
Remember, learn, and keep riding.