Dan Koelsch over at Movieviral.com just posted this quicky summary of 5 ways in which you might accidentally start a zombie apocalypse. He did a pretty great job. I left a comment reminding him about "Night of the Comet" and I'm pretty sure I'm missing another variant, but it's too early for my brain to work correctly. The movies he used for inspiration were:
I'm a little embarrassed to admit that I'd never actually heard of Redneck Zombies before. Wow. I'm surprised it's a not a Troma movie.