Continuity: As soon as the three survivors are coming out of the lab through the hatch underwater, they all signal each other to rise to the top. Look at Safron Burrows, her cheeks are full of air and you can almost see the surface above her head. You can also see the exact same shot when she is about to be eaten by the last shark. And what's with that hand gesture - to cut or for the shark to stop?

Revealing: When the sharks first attack and bite off the man's arm - you can clearly see his arm under his shirt as he's scrambling away from the water.

Revealing: At the end of the film, when Preacher is fighting the shark, we can see that it is a white stuntman doing the scene for LL Cool J.

Continuity: In the scene where L.L. Cool J. is in the flooded kitchen and the shark comes in through the door, he climbs up a shelf then falls in the water then climbs out again. Before he makes his way to the oven you can clearly see that under his pants he is wearing knee pads.

Revealing: Near the beginning when the boat pulls up and the guy on the boat tells the blond-convict fella he's got a beauty 13 foot "Tiger shark" that's up in some sort of sling, the so called tiger shark is actually an animatronic great white with stripes on it. Tiger sharks have a blunt rounded nose, not a pointed one like a great white.

Continuity: Towards the end of the movie, the character played by L. L. Cool J stabs the shark through his left eye with his cross, yet in the next scene where the shark returns to eat the female doctor his eye is clearly intact.

Factual error: A double oven has a double or triple insulating wall between ovens, not a single sheet of flimsy steel.