Like flying piranha or sentient automobiles with a grudge, an apocalypse is something humanity doesn't want gate-crashing the cosmic party. Famine. Pestilence. War. Death. These are just four types of disaster commonly associated with an apocalypse and each one is guaranteed to kill the mood at any social gathering or LAN party. More catastrophically, they can also kill a significant proportion of the World's people population. Especially Death. Make no mistake - apocalypses are no fun.