Okay, here's another post-apocalyptic scenario that Kudzu Bob mentioned to me:
6) The Rapture.
Basically, all the good Baptists suddenly vanish, leaving piles of suspenders and floral-print muumuus lying around everywhere The rest of us will be Left Behind to deal with such terrible consequences such as peace in the Middle East and the financial collapse of Golden Corral.
Well, we have quite a nice list going:
1) Barstow-like post-nuclear world (http://en.wikipedia.org/wiki/Mad_Max)
2) Earth blows up, we go looking for a new homeworld (Space, 1999)
3) Polar ice caps melt, somehow producing enough water to flood the entire planet (Waterworld)
4) Zombie apocalypse (Dawn of the Dead)
5) The Rapture (A Thief in the Night)
6) The world just keeps going the way it is now, and sucks worse. I have to pay off my credit card debt. (Soylent Green)
I moved the last one from 5 to 6 because it's my least favorite.