Continuity mistake: After Megan dies, for real, Jessica tells the others that they loved Megan and Megan loved them. Her robe opens and closes between alternate shots.
Continuity mistake: When the killer kills Joanne in the shower, the blade in which he impales her through the chin with changes.
Continuity mistake: When the killer first tries to kill Chugs, he pushes the bottle a bit down her throat. Then he pushes it down more, only showing a bit of the label and the end of the bottle coming out of her mouth. But in the next few shots when Chugs is trying to scream and pull it out, the position of the bottle changes from being all the way down her throat, to the position the killer first put it in.
Audio problem: At the end when the killer falls through the floor, he screams. However, you can see that his mouth does not move.
