Continuity mistake: Mina visits Petey at the store, tells him to sit down, sits down herself. During the conversation, the sleeve of her tee is covered in hair in the front views, clear in the reverse angle. (00:09:00)
Continuity mistake: Sue finds out the hard way that she shares a birthday with Janet. The woman blows several candles in the first shot, including the one that in the next shot is the lone survivor she still has to put out. (00:08:00)
Continuity mistake: When Debbie approaches Petey from behind asking him what did he put in the back pocket, the position of his fingers on the item changes suddenly at the cut. (00:06:05)
Continuity mistake: After her sister hangs up on her, Sue repeats in front of the mirror the self-help audio mantra. She suddenly holds the receiver in front of her chest higher than in the previous shot. (00:04:10)
Character mistake: After banker Karl was reported missing from his home, the police detective did not even think to locate his car - which he could have merely driven away in (meaning he was not kidnapped).
