Think about it.
The whole beginning. Zombies at the gates, they break through! Zombies at the windows! Zombies on the roof!
The "I'm going out to reason with them"... "argh! let me back in!" bit.
The holed up somewhere with zombies at the gates. Complete with decoy zombie.
The "you went outside, are you crazy? They could see you and then we'd all be dead!" bit.
The bit where they try and fit in to a crowd of Irani... I mean, zombies, by pretending to be 'one of them', including the one character who refuses and thinks it's suicide. One zombie notices them, which causes the others to notice and come after them!
The 'zombies don't talk, they just grunt and scream to show there's no reasoning with them' (no subtitles for most of them help with that).
The driving through thick hoards of zombies really slowly with them clawing at the windows (why did they do that anyway?).
More zombie fitting in scenes at the end with some boss zombies, then the hero's escape, but behind them the zombies are still chasing and waving their arms despite it being obviously futile.
Are you kidding me... It's a frickn zombie movie..