Complex sentence: He supernaturally revives as a zombie just as Lee blindly runs out of the house in fright, but zombie Helmut pursues her and takes her back into the house before she locks him out.
Split into simpler sentences: He supernaturally revives as a zombie just as Lee blindly runs out of the house in fright. Zombie Helmut pursues her and takes her back into the house before she locks him out.