The 'classic' films such as Dawn of the Dead, have slow moving zombies who rise from the grave. Newer zombies such as 28 Days Later sprint 24/7. I'm pretty sure that fresh zombies would still have good control of their motor functions till rigor mortise sets in. Also, a radioactive substance that makes zombies rise from the graves is ridiculous. I've seen movies where corpses, over 80 years old, rise from the grave looking like they were buried a week ago.
One more thing. Everyone who is a zombie has cuts everywhere, except their skull. It is a common fact that zombies want BRAAAAAIIIIINSSS. So why does no one have gaping wounds near their skull? Come on guys, try and be realistic.
Do you guys ever notice this while watching zombie movies, or is this just me? I guess it's not just zombie movies, but books too.