Jaws 4 (1987) - 25 mistakes

Factual error: Sharks do not roar, nor can they "stand" up on the surface of the water like this one does in the end.

Continuity: Michael Caine is knocked overboard into the water, but manages to climb back into the boat - when he reaches the deck, his clothes are perfectly dry.

Visible crew/equipment: In the scene where Michael Caine and Loraine Gary are at the Islands street party together, the boom microphone is clearly seen top left.  Mind you, it's the only highlight of a pretty drab film.

Continuity: Throughout the entire film, Ellen Brody's hair changes back and forth from blonde to white.

Revealing: Toward the end, when they have killed the shark and are all floating about in the water, you can see that the horizon is a painting. The water is even lapping up against it.

Revealing: As the shark grabs the woman off the banana boat and slams her in to the water, the fake shark's rubber teeth bend.

Factual error: The shark follows Brody into the sunken ship (yeah, right) and eventually the chase ends with the shark at the end of a very narrow passageway, with no room for it swim further forward, and no room to turn. Since the rigid nature of a shark's pectoral fins means that they cannot swim backwards this one would be stuck. And since Great White sharks have to constantly swim in order to breathe, the movie really should have ended right there.

Revealing: During the sequence when Michael has his underwater motorcraft and the shark attacks him, you can see in certain long shots the machine which works the shark protruding from under its tail.

Revealing: When Hoagie lands the plane on the water you can see they are near land when they in fact are supposed to by far out on the ocean. The sand bottom is visible. Also a sailboat suddenly appear, it wasn't there earlier.

Revealing: When the shark is attacking someone under the water you can see a hole in the shark and divers fins showing that it's a puppet.

Continuity: When Hoagie lets Thea steer the plane, Carla is sitting beside Mike in the background. When it cuts Carla suddenly has her arm raised, resting on the seat.

Revealing: When the shark bites off Sean's arm, the outline of his arm hidden under the coat is visible.

Continuity: In one of the final scenes in which the shark is attacking, the colour of the water is not consistent in the background. In one scene it is light blue, and in the other it is much darker blue.

Continuity: The transmitter device that Jake attaches to the shark is missing between shots during the entire movie.

Continuity: When Mike, Jake and Hoagie are in the plane searching for Ellen, when looking out the window they are flying over land. When it cuts they are suddenly over the ocean and when it cuts again they're over land.

Revealing: When the shark is rammed by the boat at the end, right before it explodes it is too obvious that the shark is a model. Some signs are: the oversized dorsal fins, its mouth is bent at an unrealistic angle, and it doesn't have eyes.

Revealing: When the shark explodes, in the last shot (from behind the boat) which shows him exploding it is painfully obvious that the boat is only a model and not the real boat from previous shots.

Continuity: When Mike sees through the binoculars that his mom is walking with hoagie sandwich, you can see she is wearing white shoes. However, when it cuts to the next shot she is barefoot.

Visible crew/equipment: When the shark is underwater with Jake in its mouth a black hose attached to the back part of the shark is visible.

Continuity: When Ellen and Thea are building a sand castle, Ellen is standing looking out at the ocean. Then it shows a close-up of Thea asking her what's wrong and there is a can of soda front of them. When it cuts to Ellen coming back to Thea the can is gone.