Factual error: When Chul-min is shot by Sergeant Hwang, it takes only a couple of seconds for him to die. The bullet hit Chul-min on the left-hand side of his upper chest and was only shot once. No human being on the planet can die from a single bullet wound to the chest that quickly. It would have taken a couple of minutes, maybe even longer, for him to die from that. (01:20:35)
Factual error: When Jung-seok is trying to get his sister away from her son, he begins shooting at a zombie that begins charging at him, and he falls on his back. Behind him, another zombie is shown with two other zombies lying on top of him. The zombie then manages to stand himself up, with almost no struggle and this also prompts the two zombies to fly off him. This move completely defies the laws of physics. This zombie should have the strength of an average man, and the two other zombies should be of equal, or at least somewhere near, the same weight as him. He was only using his arms and back to stand himself up, so realistically, the moment of him trying to stand up should have taken a lot more strength and a bit more struggle than what was shown. (00:08:13)
