Continuity: When Carol (the babysitter) unbuttons her shirt for the two boys, the shot is a close up of her chest, there is then a shot of the boys screaming, then the shot reverts back to the closeup of her chest again, at which point she slams her shirt closed and the camera rolls seamlessly up to her face. However, a quick eye will notice that on the second closeup, not only have her breasts shrunk to about half the size they were in the closeup where she actually opened her shirt, but also, the style of bra she is wearing in the second shot is totally different, making clear the use of a body double.
more