Continuity mistake: When Amy Smart gets into the bathtub after looking at herself in the mirror, there's very little foam on the water. Then there's a cut back to the mirror and in the following shot there's suddenly a lot more foam. (00:45:30)
Continuity mistake: Just after fake Amy in the mirror starts to cut her daughters neck slightly with the scissors, the real Amy having escaped the bathtub grabs her daughter and puts her in the corner of the room. Soaking, she removes her top exposing her right breast and nipple - next shot she has a soaked singlet on which wasn't there a second ago.
