Unfortunately; Fortunately

Unfortunatly, A metor crashed down and fell on the poor magic wizard

Fortunately, the Witch-King was taken out by the meteor as well.

Unfortunately, the meteor spawned large maggoty creatures that roamed about, destroying things.

Fortunately, the creatures were flattened when they roamed straight into the path of a four-wheel-drive.

Unfortunately, their blood was acidic and ate away at the tires until there was nothing left and the car smashed to the ground.

Fortunately, the car was robotic, and nobody was hurt.

Unfortunately, at the sight of their fallen comrade, robots started a rebellion against the human race.

Fortunately, Will Smith was there, kicking butt

Unfortunately, Chuck Norris was fighting with the robots. Needless to say, they won.

Fortunately, the robots were bound by the First Law of Robotics (Asimov) and were unable to hurt Smithy.

(According to the First Law, they are also required to prevent Norris from hurting Smith, so long as they do so without hurting either humans. I know, geeks rule. And don't make Norris turn on them, because they're bound by the Third Law to protect themselves, unless such actions contradict with Laws One or Two, yada, yada, yada..)

(Unfortunately, I didn't understand exactly what you were talking about.)

Unfortunately, the robots, bored with not being able to hurt anyone, ran off to another city to raze to the ground.

Fortunately, the entire city was deserted, so they could raze to their hearts' delight without the worry of killing anybody.

Unfortunately, they did kill someone.

Fortunately, it was just a rat.

Unfortunately, that rat had some very powerful friends who avenged his death.