In the feed, Xu Ningyu was missing an arm. The bluish-grey pallor of his skin and the milky white film over his eyes confirmed he was fully transformed.
But unlike the other zombies who followed the drone downstairs, he was slamming his body against our door.
Tian Tian and I watched for a while. His banging seemed random, instinctive. We relaxed slightly.
As long as he didn't figure out how to use tools, these doors could withstand his battering until he fell apart.
But the constant thudding attracted the red-eyed zombie upstairs.
The drone's music had been deafening, yet the red-eyed one hadn't budged. Why did the door-banging draw it up?
Tian Tian and I watched the door camera nervously. This red-eyed zombie was visibly different. If it knew how to dismantle a door, Tian Tian and I were dead!