Revealing mistake: When Brenda's body is thrown through the window, the movement of her head when hitting the floor is not "limp". She positions her head for the landing, then deliberately tilts it to the side as if dead. Also, on the second cut from Alice to Brenda we can see Brenda's head moving ever so slightly. (01:14:17)
Factual error: When Jack and Marcy are sitting by the lake talking, a storm starts. At one point, lightning flashes "yellow" in their faces. Lightning does not flash yellow.