Some people have taken to trying to disprove Zombies as of late - which is somewhat disturbing. I don't see why you would have to spend time talking about how something is impossible if it really was. Additionally - there are existing parasitic viruses that would actually make a zombie disease quite possible. Truth be told there are parasites that will take control of an animal and direct it to do things that help it spread.
One of the more entertaining episodes of Fringe covers this well. There is a virus that infects a man, and the team is trying to figure out how the virus spreads because it seems to only attempt to spread at certain times. Come to find out, the virus is semi-sentient in a way because the virus takes advantage of its host's senses and understands when there are new people to infect. Once it has a larger group to infect, the virus will turn its host into a virus spewing biological weapon thus expanding its reach. It doesn't become contagious based on time or development - but on proximity to other carriers. Now that is a pretty vicious bug.
Back to the movie - that my fiance wants me to see. I am not going to see the movie - I don't think I want to have a heart attack, especially since a majority of films adopt the "jumping out as a method to scare" tactic. I like higher quality terror, jumping out at you doesn't scare you - it proves that your reflexes work. anyone who doesn't jump has PTSD or is a likely candidate for extended nerve damage. I prefer quality slow, gnawing terrors that come up inside your mind and leave you feeling horrified and questioning every shadow.
Come to think of it, that is kind of how my Zombie fear works isn't it?
