Board Thread:Wiki Management/@comment-25089892-20150418094003/@comment-7234182-20150418223342

1Zulu wrote: I have already explained this multiple times, but here it goes again.

Regular zombies have 10 HP, right? WRONG! Regular zombies have 13.5 HP.

However, they have a "critical point" at 9 HP. What is this critical point business? Well, it's a point after which the next shot will cause the zombie's HP drops rapidly to zero (at a rate of 3 HP/sec), but it is still alive to the game. This means a zombie who's taken 10 shots is still alive for a couple of seconds. Even though it can no longer damage your plants, it will still absorb shots.

This is why zombies who appear dead (lost their head) are still attacked by plants. Plants don't attack dead zombies. Internally, a zombie without its head is not dead yet.