With our berserker rage and our superhuman regeneration capabilities, zombies can seem infinitely dangerous to the unarmed non-zombie observers. Though zombies can be very destructive when enraged, they remain at their previous levels of strength. What zombies do that makes us so threatening is that we ignore pain.
During a rage, the usual sensations that accompany pain don’t reach the brain. A zombie will not stop when the pain starts, they’ll power through it. The discomfort, the blood loss, and the soreness mean nothing to a berserker. Eventually, other effects from these injuries will catch up to the zombie, but not before some serious damage has been meted out. However, anyone aware of this can use normal means to overpower a zombie.