Zombies?

I know this probably sounds far fetched, but think about for a moment. What if the end of the world was because of zombies. Do you think we will ever be able to "bring dead cells back to life"? And what would be the effects of that? I saw Resident Evil and thought, that doesn't sound very impossible. then I saw the opening title sequence in the new Dawn of the Dead and thought if zombies ever did become part of reality, that is what would happen around the world. What would you do if that ever happened? I'd probably go crazy because everyone I know would most likely be dead (I probably would too). But I geuss if you think it through, surviving it for atleats a while wouldn't be that hard. Hold up in a house or building that has all windows and doors leading to the outside blocked. When you begin to run out of food is the problem. what do you think about this?