"A Black Swan Event... has three important characteristics. It is not something that is expected on a normal day of the week. Next, it carries an impact that is profoundly felt – either locally or globally. Last of all it almost always relies on human nature to then try and make up reasons – however strange – for why it happened in the first place."
Your chair is killing you.
Trivia (5 Biomes points): Not too long ago iTunes sold its ten billionth song. Who was the artist?