I've been what felt like pretty close to a lightning strike before, but I don't remember noticing anything like that. I was close enough that everything around

I've been what felt like pretty close to a lightning strike before, but I don't remember noticing anything like that. I was close enough that everything around me was illuminated like a camera flash, the sky behind the trees nearby looked bright white when it was a rainy, cloudy grey just moments before. The shadows on the ground looked stark and crisp and very long. The flash of light and the sound were simultaneous as far as I could tell. But the strangest thing for me, which I had never experienced before, was I could feel the ground shake as well. At first I thought it was some kind of explosion but as I ran as fast as I could I realized it must have been lightning. The scariest part was later when I went to check again what the speed of sound was and I saw about 340 m/s, then I realized for the sound to be apparently simultaneous with the light, it would probably have had to have been no more than 250 ms behind the flash, conservatively, or I probably would have noticed the delay. Using that as an upper bound it puts the strike at no more than 85 meters away. Realistically it might have been in the neighborhood of 50ms, as I don't think I could perceive that difference at all. That would have put it about 17 meters away, but I wonder then if I would have been within range for electrocution had that been the case. The ground was soaked but I was walking on asphalt, if that makes any difference. Searching now I see lightning can arc horizontally on the ground around 20m, so maybe it was really somewhere between 50 and 250 meters away.