Continuity mistake: During the famous leg un-crossing scene when SS is being interrogated, a cigarette in her hand disappears and then reappears, but who was looking at her hand at the time?
Continuity mistake: During the interrogation scene, Stone has her legs crossed right over the left then suddenly left over the right and a second later (during the shot where she wears no underwear) right to left again.
Continuity mistake: During the big sex scene you see red marks on Michael Douglas's back. These red marks are from when Sharon Stone scratches him. The thing is, she scratches him a minute AFTER you see the red marks on him for the first time.
Continuity mistake: In the scene where the actual murder takes place the blonde woman stabs him in the neck. The body has no blood on it. The second stab the body is covered with blood. This all happens in one eyeblink.
Continuity mistake: Douglas opens a mailbox to check the mail for clues. He then puts the mail back and closes the box, a second later you hear him closing the mailbox again.
Continuity mistake: As Michael Douglas and his partner drive Sharon Stone to the police station for questioning in the shots of her she's sitting on the left of the rear window. When Gus Moran looks at her in the rear view mirror she's on the other side next to a large police light. Throughout the scene she moves left and right between shots on the back seat.
Continuity mistake: Michael Douglas goes back to Sharon Stone's house where she invites him upstairs as he watches her break up ice cubes with an ice pick. If you look closely at the painting above her fireplace, you can watch the different times of day go by between shots in the reflection of sunlight off of the pool and onto the picture.
Factual error: Michael Douglas is lying on the couch watching the Jeffersons. Jeanne Tripplehorn arrives and they talk. In the background the theme song to the Jeffersons is playing, but it is the song from the beginning of the show rather than the closing theme.
Continuity mistake: When Roxy runs off the bridge you see the Lotus crashing over with its low beams on - when you see the car fly off the bridge its brights are on.
Continuity mistake: Sharon Stone leaves the top of Michael Douglas' back all bloodied with her sharp fingernails. After the lovemaking scene, Roxy talks to him in the bathroom and we see the reflection of his back in the mirror. The scratches on his back are now much lower and not anywhere near the right place.