Plot hole: The snakes escape from the locked box stored in the cargo hold when a small explosive bolt detonates and opens the lid. Post 9/11 all luggage placed in the cargo hold of an airliner would be tested for explosives, and anything larger than half a match head would be detected. The chances of getting an explosive bolt on board - nil. None whatever. You can also think of it this way - if the bad guys could somehow smuggle explosives on board, why bother with such an elaborate and flawed plan as letting snakes loose on the plane? Why not just smuggle a bomb on board? Pan Am 103 - the so-called Lockerbie flight - was brought down with a bomb that fit inside a small cassette player.
Factual error: When performing CPR on Elena, Robert doesn't tilt her head back. As a former firefighter, he would know one of the first steps of CPR is to tilt the victim's head back to clear the airway. His rhythm is also way off.
Suggested correction: Tilting the head back to clear the airway isn't practised any more, due to exacerbating possible neck/spinal injuries. Instead, one would do a chin lift to clear the airway. But alas, he didn't do that either.
Paramedic here. The head tilt-chin lift is absolutely still practised today and is definitely our go to manoeuvre for CPR. You're thinking of the jaw thrust manoeuvre where we do it when we suspect spinal injury, which Elena did not have.
Former Volunteer First Responder and Ambulance driver part-time but also volunteer here. It actually depends on the SOP of the company in which you serve. Liability purpose has us practising caution in otherwise duty-to-act scenarios. While you are always to remain either Red Cross or American Heart certified in CPR, ALS guidelines and SOPs still govern the practice in which you are performing and can be effected by the decisions of your local Medical Director, but I digress.
Factual error: The poem Isolde recites, John Donne's "The Good-Morrow", is a 17th-century work, which is centuries later than the movie's time period.
Continuity mistake: When Magneto lands the Golden Gate Bridge on the island, as it hits land it is still very light. When the Brotherhood start to walk toward the island, it cuts to a wide shot of them still walking on the bridge, and it's suddenly dark.
Plot hole: There are six metal bars mounted around the circumference of the water wheel's axle. In the wheel's interior, when Jack frees himself he lands on his feet, begins to run and promptly hits his head on one of those mounted axle bars, then falls out. Moments later, when Jack returns and runs in the wheel, he is shorter (way more than a foot) than all six of the mounted axle bars spinning with the water wheel, which would make that previous shot impossible, however humorous it is. (01:52:40 - 01:53:55)
Continuity mistake: In a scene towards the end of the movie, where Bond and Vesper are lying on the beach, Bond has sand on his back throughout most of the scene. When they start to kiss, in the distant shot towards the end of the scene, he has no sand on his back at all. (01:57:10)
Other mistake: When Jaguar Paw is running to reach the corn to escape and gets knocked down by an arrow; Middle Eye was about to whack him when Blunted intervened. You can hear Middle Eye say in English "Get off me!" while he's being held back. (01:27:52)
Factual error: Dexter the capuchin is in the African mammal display. Capuchins come from South America.
Continuity mistake: Watch the newspapers on the front of the bus when Mos Def is getting off. At one point there is a big hole and you can see out, but in the very next shot a newspaper is covering it again.
Audio problem: At the end of the film, where Big Momma is performing with Carrie's cheer leading squad, when Andrew breaks loose and climbs up the human pyramid that the girls made, and jumps, falling on Big Momma's stomach. Then Andrew says, "Big Momma" but his mouth doesn't move.
Visible crew/equipment: When Lois pulls up to the house where the blackout was traced to, she hears some music coming from the boat down at the dock. As the camera pans upwards over the car, as she steps out, the whole camera and a crew member are reflected in the side of the car.
Revealing mistake: In the disco scene, the DJ is playing music, but the Pioneer decks and the DJ Mixer are not even turned on, as no lights are showing.
Factual error: In the beginning of the movie William supposedly boards the train in Lincoln, Nebraska. All the vehicles in the train are from Europe and never rolled in the United States. (00:03:35)
Continuity mistake: At the end, during the fighting in the Cathedral, the last woman left is getting first cut by Steven Seagal at the right breast. A moment later, her cut is on her left side. The next moment it is on the right side again.
Continuity mistake: In the long crash scene at the end, the Perrier car loses the front passenger side tire in the initial flip, but in the next shot it is attached to the car again.
Continuity mistake: Right before battle, Nasuada is showing Eragon Saphira's dragon armor. The helmet is full face, with two little slits for eyes. When it shows Saphira wearing it, the helmet covers only the top part of her head and cuts off above her eyes. (01:20:35 - 01:22:30)
Factual error: As the two fast boats start heading up river towards the finale shootout, one boat has its navigation lights reversed. It has a red light on the starboard/right side, and a green light on the port/left side. It should be the other way around. (The lights on the other boat are correct.)
Plot hole: Where did Cross get the blood on his hands? The gloves were clean of blood after he looked at the teeth and removed the gloves, so where did it come from?
Deliberate mistake: Bare shoulders are forbidden in the Vatican premises, so the sexy dresses in the party would not be allowed.
Continuity mistake: When Leonidas, and presumably all the other Spartans, use their spears to clear their shields of arrows after the arrow shower from Persian archers, the tips of the arrows are still visibly left on all their shields. In the next shot, when the Spartans regroup for the Persian cavalry charge, the arrow tips are gone. (Granted, this is a highly stylized movie based on a comic book, but that does not change the fact that this is a continuity error.)
Suggested correction: They wanted to make it look like an accident. If the snakes had done their job fully, plane crashes and no-one is the wiser. If the plane blew up halfway it would have screamed foul play. As it was in the movie it was just a terrible accident, a bunch of snakes being shipped got loose.
That doesn't correct the posting. The error is that they could not have smuggled a package equipped with an explosive bolt onto the airliner in the first place. It would have been detected and the package removed from the airliner and either defused or safely detonated. As for nobody being the wiser after the plane crashes, what were all those dead snakes doing scattered about the wreckage?