Continuity mistake: In the scene where Karen is about to process the sample from the bathroom the vial is in her right hand and the swab in her left. In the next shot the vial is in her left hand and the swab in her right.
Continuity mistake: In the scene where Karen is about to process the sample from the bathroom the vial is in her right hand and the swab in her left. In the next shot the vial is in her left hand and the swab in her right.