The parry skill is when of the most used Melee skils in Zombie survival. It works by bashing(hit and block at the same time) a zombie within a certain timeframe when it attacks you, after you successfully completed this a yellow indicator will show above the zombies head. When the zombie is in this state there is a huge damage multiplyer and it can't hit you or throw poison, slow, ect, for 3 Seconds.
Parrying in action
//Need .gif (possably) //Need video(s) failed and completed
As you can see in these videos the parry window is not anytime before an attack but right before they're about to hit you
//Note to self/other fix this