Visible crew/equipment: In the second scene where the main character approaches the car, there's the filming crew visible in the right corner of the car's bumper. (00:02:30)
Visible crew/equipment: When Ed is playing the Elvis song there's an unexplained arm visible in the reflection of the glass in the corner of the room. The arm is visible for around 1 or 2 seconds before moving. (01:24:00 - 01:30:00)
Visible crew/equipment: When Marcy tries to shoot the dog, you can see a crew member who picks him up at the left side of the little appliance room.
Visible crew/equipment: When the zombie outbreak begins on the train, Seok-woo runs into one of the train cars that have no zombies, carrying Su-an with him. He places Su-an on the ground, and just before he does so, a yellow tape marker can be seen on the ground, allowing the actor to know where to place the little girl actor when he stops running. (00:26:27)