When I rode fire trucks we had a call to house with a lightning strike. The lightning had hit a large old tree about 8-10 feet from the house. The thunder blew out the windows on that side of the house. What amazed me was every large root was "unearthed" as if carefully done with a hand shovel and the dirt evenly distributed on both sides of the "trench". Truly a sight to see. Unfortunately, I think it killed a pretty nice tree.