DESTROYER:
ZOMBO:
Thanks for the share! Here is some updated info for this video:
After a dev commented on the video, I have renamed it Vital Organ Damage.
Zombies have a chance to hit for crazy amounts of damage at random. This is the main cause of insta-death from zombies.
This bug/feature is still in DayZ. I died a few days ago from this. Check my 0.55 tips video for my death in the outro.
Recent tests reveal that we take less damage from future hits once hit. So if I'm hit by a zombie for 300 blood, the next hit from that zombie will be lower. This continues until death occurs from a single hit(even while healthy).
None of the info I post is conclusive evidence. Just speculation by picking the most logical answer.