Continuity mistake: When Dana's hands are tied behind the chair, her hair is neatly combed, but some shots show her hair dishevelled and with a loop sticking out on the right side. (00:16:58)
Continuity mistake: The tape covering Dana's mouth starts out being smooth/flat but changes several times to loose/wrinkled. In close-up shots, the perimeter is likely to be completely adhered around her mouth with the rest of the tape smooth and even. (00:12:50 - 00:13:54)
Continuity mistake: During the "bedroom scene", Dana suddenly had wrist chains on for a short period of time. Before this, a chain could be seen dangling along the wall near the bed, but the chain was never seen going onto the bed. The same is true for the chain attached on the other side of the bed. (00:02:50)