"If the apocalypse happens, it doesn't have to be all bad, here's how you can make it work for you. And you'll know when it's happening because, ZOMBIES. If the apocalypse happens, then it means that I'm wrong and there is a God and there is an afterlife. But here's the good news: in the afterlife, like in Heaven you'll be in the *****in' VIP section of eternity! Cause everyone up there is like 'Hey, how'd you die?' And they're like 'Bus accident,' and 'How'd you die?' And they're like 'Fire ants.' Then they go 'How'd you die, man?' 'How'd I die? In the *****in' apocalypse! Oh my God, it was awesome! I'm in the velvet rope section of eternity! You should've *****in' been there man, *****in' volcanoes came out of the ground and spewed menstrural blood into the sky, and then it formed into Avril Lavigne's face, and she recited the 'Good Will Hunting' screenplay, then the words turned into sentient razors and they bored into your flesh, George Bush was president and mediocrity held sway!'" - Patton Oswalt http://en.wikiquote.org/wiki/Patton_Oswalt
In addition to the time dilation SM mentioned you would also die from spaghettification where the difference in gravity from your bottom and top willl stretch you out down to the molecular level. As for my apocalypse I've always though Ragnorak battle between gods and giants would be pretty cool.
