Gas line explosions are no laughing matter. They can cause serious damage and loss of life. This is why energy companies are serious about people calling right away when they smell gas. Sadly, one cannot always avoid disaster. Earlier this week in the eastern town of Ludwigshafen, Germany, a gas line exploded. The huge explosion killed a construction worker, injured 26 others, damaged 50 homes, and left a 20-foot-deep crater in its wake. If that sounds crazy, just wait until you see the pictures. They look like something out of a Michael Bay film. Here is the giant fireball of...