Factual error: Deputy Winston introduces herself and says she's with the Bunyan County Sheriff's Department. Her cruiser is mislabeled with Ackamas County Sheriff markings. (00:57:00)
Continuity mistake: When Paul gave water to Karen her mouth is very bloody - in the next shot her mouth is completely clean. (01:00:55)
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.
Chosen answer: Pancake is the name of Henry's dog, he shouted it after he found his dog dead by the disease. If you are wondering who Henry is, it's the guy at the beginning who got infected first in the film, and I guess the kid screaming it obviously knew what happened to Henry, he obviously knew Henry and Pancake.