I tried my best as I pushed down on the saw to cut her infected leg off. The screams of my wife echoed through the empty room as I sawed through her flesh. The smell of burnt skin and blood filled the air. Suddenly, her body convulsed and her head jerked back with a terrifying force. I thought she had finally passed out from the pain, but then I heard her voice, sounding distorted and inhuman, whispering, “Harder… faster…” I froze in terror as the saw slipped from my hands and my wife’s head spun around, revealing black eyes and a wide, unnerving grin.