Sentence:  When Anna and John finally break out of their self-centered bubbles to the shock that they must battle to the death an <WSD>undead</WSD> neighbor in a giant snowman costume, it plays like a poignant comment on movie teenagers' tendency to indulge their inner lives, ignorant of the world around them. 
Meaning of the word marked with <WSD> tags:  Being animate, though non-living.