Dude I know what that was I v seen it before. A electrical transformer blew up. You heard the vibration and buzzing of it failing followed buy the actual explosion of juice. Bascly when they blow up they make lightning, I saw this on night when I was smoking a bowl outside, and strait up though I was beening invaded I took out the AR-15 loaded a gernade toked my bowl and waited for about two hours in the freazing cold for first contact.imp: