Question: What was the whole "pancake" scene all about? I understand the director had the kid doing karate for the movie because he was impressed with it. But what does the kid yelling "pancake" have to do with karate?
Answer: When they bring Paul to the hospital he sees a person in a bunny suit holding a needle and a plate of pancakes over a kid. Maybe Dennis was there before.
Question: At the very end there is a girl scrolling through Facebook or something of the friends who went to the cabin when she sees Karen's death pictures. Where the heck did these pictures come from?
Answer: She was shown taking pictures of herself when she was rotting in the outhouse.
Yeah, but why?
Question: Where did he find time to get another clip to kill the hillbillies but no bullets to kill the sick friend in the shed? After his other friend's head was blown open?
Answer: It was on safety mode. The hillbilly told him that.
Answer: I think he had the safety on in the shed and they used the clicking to show it was not firing.
But he shot the dog right before that.
Answer: He used a different gun.
Question: What was the purpose of the scene after the credits? Who was holding the camera to take the pictures?
Answer: I have seen this stuff in other media. I think the purpose is to make room for a sequel. And holding the camera, I think it was just lazy on the film makers part.
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.