What is wrong with those people (zombies)?

Watching zombie movies quite often you can spot the following pattern:  after craziness of an initial outbreak a group of survivors make to a relatively safe shelter where there is some food – a mall, a huge superstore, etc. They barricade themselves in and then the action slows and our focus is on interactions between the group members. At this point usually we can tell who has been bitten and not taken care of – so we just have to wait, or, more commonly or anyway, the survivors do something really stupid – to push, as I can imagine,  the action forward. Quite often and without a good enough justification they want to leave the safe place they are in – usually by getting into a lorry or something like that in order to go somewhere.  Then something goes wrong – sometimes they just drive too fast or somebody previously bitten transforms into a zombie, anyway – most of them die in the process.

There is also something wrong with zombies. Classical zombies tend to be dumb and really slow sometimes limping for no reason. Besides, if the infection spreads through just biting it does not explain the fast rate of the process. Energetic, agile, aggressive and intelligent zombies are quite rare – like those in the “I am the legend”. 

MG