"If zombies were chasing you would you trip your best friend"
That's the question, not how long can you run. Either you will or you wont, it will not have anything to do with what's happening, unless your extremely fickle I guess. Atmospheric pressure, yea, that makes a BIG difference, unless you decide to run from california to colorado I don't think you'll notice anything. Temperature, zombies can't feel so...
Zombies are more of the stagger towards you slowly type because there foot is in there hand.
Er, how would them holding a foot slow them down??? They don't run on their hands...
