An explosion hit a fertilizer plant near Waco, Texas, last night, injuring at least 100 people. And of all the related videos I've seen, this is the most terrifying. The footage was taken by a father and his kid, who were in a car a few miles away from the plant. In the video, the plant is on fire and then a few seconds later it explodes.  The explosion is so loud -- even from miles away -- the kid in the car says he can't hear anything, and the dad drives away.