You'll accidentally inhale it. Then, it'll travel to your lungs and rest itself in the most unsuspecting place. It will then remain there until something else comes into contact with it, and it will then be forced into the edge of your lung, and because the piece of dust is extremely sharp, it will pierce the edge of your lung. Then, blood will flow into it as you slowly die of lack of sufficient oxygen. Sleep tight, my child. Don't let the sharp dust particle bite. Pierce, that is. Er.. go to sleep.
Mom, how can the above statement kill me?