If you were lucid (knew it was a dream) instead of trying to wake up why not just ignore the zombie, if you ignore them they disappear.

Generally I don't need any specific dream action to wake myself up. If I am lucid and have been so for a long time and I ask myself a question like how did I become lucid and I don't even remember (while still lucid) then I know I am losing as much dream as I am gaining so if it is a good one I just wake myself by thinking wake up. Sometimes when I have a lucid that is unstable and completely sucks then I try to run thru a wall into the void, to summon a new dreamscape (I call this attempt dream suicide, attempting to kill the dream).

Of course I have false awakenings both where I begin to false journal believing I am awake, and where I realize hey how come I woke up on this bus or something and return to being Lucid. Sometimes when I survive the void I seem to have woken up somewhere but I'm not likely to fall for a false awakening from the void.

Next time a you are being zombie chased in a Lucid dream try this. Hold out your hands not all the way out but mostly then stretch them and as you do grow into a giant. Then turn and stomp the zombie into a pancake then pull your arms in to shrink back down. Or try to fly away or go thru a door and close it and ignore the zombie, or draw a weapon and kill it (always throw away the weapon afterwards, walking around in your dream with a drawn weapon is just asking your subconscious to send you some more trouble, 'hey subconscious I want to fight' is the message it sends)