but if it was lucid dreaming, then you could have changed the dream with your wish isn't it?
Hmm, sometimes yes, sometimes no. Depends on when I realise it's a dream, the magnitude of the dream, and whether or not I want to explore the dream anyway.
Zombies are one of those monsters that can be symbolic for a lot of things. And how a person reacts to them can say just as much. So sometimes, it's worth exploring the zombie dream.
Also depends on if it's actually a dream or not. I don't think dreams (including nightmares) are always dreams... maybe I'll make a "dream theory" post one day to explain that, lol.
How much time does the person waking you up takes?
It varies.