The countdown to the countdown I believe it was...and intermittent countdowns in between.

@ Kangal ...that is 2 types of zombie but you are forgetting the 3rd type ...which I alluded to.
the 2 you mention involve deceased ...as a motivator which is either a spiritual or an "infection" which causes their mobility.
the other type of zombie I mentioned was the "Pre-Romero" Zombie.
Not dead. A living person ... voodoo which include rites to essentially turn a person into a mindless slave. The original Zombie. When I was younger I traveled around quite a bit and had the opportunity to (for lack of a better term) hang out with some pretty interesting people ...I've seen some pretty strange stuff...never saw a zombie myself...but I heard stuff from locals about some peoples ..some places to stay away from..stories..warnings.. I did have an opportunity to talk with a Houngans from Haiti...talked with all kinds of people over the years from different places...and yea...strange man...strange...
That kind of zombie could do it...could float...that is...perhaps...since he isn't dead.
I don't know...
One thing I do know is...on reflection ...the thought of a dead guy or a horde walking, running chasing me to kill me ..for a hollywood concept of feeding on brains or what ever...sure...If I was realistically confronted with that...that would scare me silly...give reason to pick up and start running.
But a once healthy living person or people with individual identities reduced to mindless slaves obedient to their masters order chasing me down...I'll still be running ...still scared... but the thought of this kind of Zombie fills me with ...hm...dread? that is a good word.

The modern "Post-Romero" zombie (which has dominated across cultures) is nothing more than a ghoul (not the arabic concept of ghoul which is demonic...but rather the more european concept of ghoul) chasing down "live" meat....(hell I think Romero himself is quoted as calling his film "creations" - ghouls..)
Regardless of the process of how they were initially created or generated...virus...infection...radiation...toxin. ..spiritual ...they all are a "Post-Romero" influenced concept of a zombie.

The "Post-Romero" zombie may be putting it's stamp in the psyche of the world and as a new mythos...but there are older accounts of zombies predating Romero by 1000's and 10's of 1000's of years...and some have very slight similarity to absolutely none at all.

But what is needed is someone with proper studies in such matters to add more than I know of... or what little else I know of that I desire to talk of on the matter...since I feel it becomes an uncomfortable topic...one that isn't fun to talk on... the more one learns or studies or talks of such practices ...but becomes grimmer and bleaker ...
like going from a scene of a summer day in colour and warmth..
to a winter scene...dead-cold ... black and white..colourless ...
Brr.