The day my grandfather passed away, the sky was gloomy, as if even God was mourning his passing. However, something even weirder happened at Grandpa's funeral - his body mutated into an irrational monster. I remember that night, the elders in the family were all panicked. Grandpa's body suddenly sat up, his eyes empty but full of aggression. Families fled in all directions, screaming and crying mixed together, the scene was chaotic.