Three weeks ago I heard a loud explosion outside. At first I thought that sounds like a transformer blowing but it can't be because our lines run behind the house so it wouldn't be out front. Some girl came along and plowed into the front of my son's truck. We've had several over the years on my street, even a car that hit a van once that ended up turning the car upside down it hit the van so hard. I wasn't home for that one but nothing came close that's been hit while I've been around that sounded like a bomb went off. Ruling out a bomb the transformer came next in mind. I could only imagine the sound that made from the looks of the picture.