I Know What You Did Last Summer (1997) - 17 mistakes

Continuity: After Barry has jumped into the water reclaim the crown, he comes out of the water with a perfectly clean shirt but in the next shot the blood is back on his shirt as expected.

Continuity: Max lies dead in Julie's car covered in crabs. He was hooked very deep under his chin, yet when we see him, the wound is gone.

Visible crew/equipment: When Julie comes home at her mothers house, she looks at her diplomas on the wall. When her mother comes in the room, you can see a reflection of a boom mike in the frame behind Julie.

Visible crew/equipment: When Helen is being chased by Ben, she runs to "Shivers" and up to the glass door, screaming "Elsa!" In this shot you can see a crewmember reflected in the glass door.

Deliberate "mistake": The film supposedly took place in the Coastal Carolina region. This is a geographically flat area, called a coastal plain. In the beginning of the film, the kids were driving along ocean cliffs, which are not present in the Carolinas. Obviously, this was filmed in California.

Factual error: When Helen and Julie are researching David Egan on her computer, the browser shows the URL as '//http:cnty457.lib.org'. It should of course be 'http://cnty457.lib.org'.

Factual error: David Egan's obituary says he died on 'Wednesday July 5th 1997'. In 1997, July 5th was a Saturday.

Revealing: When the killer is dragging the girl's body with the meat hook, you can easily see that it is a doll.

Revealing: Portion of the film were shot at an old farm house. The trees were bare, without leaves. Obviously filmed in the winter.

Factual error: Near the end, Julie James is crouching down by the front tip of the boat with a flare gun in her hand. Now, she is crouching so she is looking straight at the rest of the boat, instead of looking over the front of the boat. Then Ben Willis starts the boat with a big push and she falls back against the tip of the boat and the gun flies out of her hands. Now when you do that with a car, you normally fly backwards, but since Julie is turned around the other way, she should fall onto the piece of boat in front of her.

Deliberate "mistake": Another indication that this was filmed on the west coast is that in the opening shot you can see the sun. If this was North Carolina at sunset then the sun would not be visible across the ocean.

Factual error: When JLH visits Missy at her home Missy says she went to Southport High, but in the July 4th celebrations the marching band has a banner which reads East Brunswick High School. A bit strange that a "small fishing village" would have two high schools for the simple fact that well the town probably couldn't afford it and it's pointless to have two when the village is so small. Factually, Southport does indeed have just one high school - South Brunswick High. See http://schooltree.org/NC-BRUNSWICK.html.

Continuity: When Helen finds the word 'SOON' written on her mirror she smashes it. There are two shots of the mirror being broken - in the first the center of the cracks is between the O's and in the second it is in the middle of the first O.

Revealing: When Julie is in the room filled with ice, some of it jiggles when she moves it, probably a prop made of jelly.

Other: After Barry (Ryan Phillippe) is put in the hospital, the four of them are talking about the murder and who tried to kill Barry. If you look at the door to Barry's room it is open - didn't anybody hear them talking about murders and a man with a slicker?

Continuity: When the Fisherman jumps out at the girl in the store when he is in the plastic bag, he misses and falls to the floor. If you look at the Fisherman when he is on the floor and waving his arms notice he isn't carrying his hook. However, in the next shot when he is standing up, the hook is in his hand again.

Continuity: When Julie comes home and finds the letter, her lips are pale and she is not wearing lipstick. When the shot shifts focus from the letter to her face again, however, she is wearing purplish lipstick.