There is a group of people that thinks the world will end in 2012. Some people believe in such end dates and the idea that the universe will stop existing or fall in to some kind of Armageddon/Rapture at some predestined point in time (I think the JWs had it pegged in 1925, then 1974, 1978 and some time in the 90s).
I am not one of those people.
I believe, rather, that a certain number of events must occur and a certain number of objects must be fashioned. When all of those events have happened and all of these objects exist, only then can the universe close itself up and cease to be.
Some of these things can be predicted in advance: for example, I don't see how the universe can close up until we have a sensible theory of quantum gravity and a Crash Test Dummies cover of The Gambler.
Other things, like a fully automatic, tripod mounted, belt fed Nerf machine gun, could not be predicted in advance. Nonetheless, in hindsight, such a thing is absolutely pivotal to finishing our universe.
Today I discovered something just like the Nerf machine gun. Something that, in retrospect, now seems absolutely, in a blisteringly obvious way, crucial to any declaration that the universe has fulfilled its potential and can just quit now because there's nothing else worth doing.
Ladies and Gentlemen, I give you, "Shakira covering Back in Black":