My dad and a few family members saw witness the explosive power during a thunderstorm in Indiana, in the 60's. They were sitting in the living room when a lightning bolt hit a tree in the front yard and ball of lightning shot out of the split tree..traveled up the driveway..stopped on the walkway leading from the driveway to the front door and exploded. It created damage to the corner of the garage, took down the electrical and telephone lines, and cracked the cement of the walkway. The crack in the walkway was still visible when I was a kid in the 70's..and I think just still remained when they sold the house in the 90's.