Anything that is pursuing you, a zombie, a rat, a snake, a bear, etc., you are gonna do your best to evade. So I would say the fast. Be that as it may, I am a zombie"purist". I find slow moving zombies, even moaning zombies, as a little off. They're dead. They should not be breathing. But I am willing to write on this timeline and still be productive. Like I said, I am a purist. Doesn't affect how I write for Lost Zombie.