It's probably dark, or darkish where you are right now. You're reading this thread, suddenly the power goes out. Your computer screen flashes off. Before you can adjust to the darkness and find your cellphone for light, a bright flash, like one of those huge LED maglites, appears for just a second in your window, like a bolt of lightning outside your house. There's no rain, and oddly enough no clouds, but you do hear a sizzling noise from outside. You look outside and realize there's a bright, bright light from the opposite side of your house. There is complete and utter silence, not even the distant traffic anymore. You wonder if you've been, I don't know, deafened somehow. You run to the other side of your house and look out the door. Visible over the trees and houses is this. You have less than a minute. What do you do?