“Walk or die” has been replaced by “die and walk”. The most terrific aspect of the zombie is that it first appears as the casual shape of a typical civilian which mind has been sucked out and left empty. Zombies are terrific because instead of delicately sucking your blood as the vampire, they come in disguise and brutally tear you into pieces.
The deactivation of a zombie’s nervous system, caused by the curse or chemical and genetic alterations, has often been used to explain their very low mobility and rate of metabolism. The chemicals in the human hypothalamus acts as a stimulant for their metabolism, prolonging their not-quite-dead condition.