looking up ball lightning, Skip, as we know him, I find this perhaps relevant to Tungaska Event text

[Mark Kohut]

Yet another hypothesis is that some extreme ball lightning is actually the passage of microscopic primordial black holes through the Earth's atmosphere. Inspired by M. Fitzgerald’s account of ball lightning on August 6, 1868, in Ireland that lasted 20 minutes and left a 6 meter square hole, a 90 meter long trench, a second trench 25 meters long, and a small cave in the peat bog, 
       
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