Revealing mistake: When the kids are burying Gus, his supposedly dead face flinches when they shovel dirt on him.
Revealing mistake: When Gus is putting the kid in the body bag, there is a close up of the kids' faces. Just as Gus is zipping the bag shut the dead kid blinks.
Revealing mistake: When Chase is turning Marjorie's body you can see that the actress is breathing.
Revealing mistake: When Drew is carrying Zowie to bury him, you can tell its a fake stuffed dog.