Continuity mistake: Just after Alan gets Lex out the pushed over truck, the T-Rex walks up to them and it is standing about an inch away from them, but in the next shot, there is no sign of it, then reappears in the next shot. (01:08:25)
Other mistake: Ray is trying to access the main server and mouths what he types: "access main program", "access main security", "access main program grid". However the text onscreen reads "access security", "access security grid" and "access main security grid".
Continuity mistake: When the cars are approaching the gates of Jurassic Park, there is an interior shot of the second car over Ellie's shoulder. In the car's rear-view mirror, there's nobody in the back seat. (00:41:35)
Continuity mistake: When the T-rex is attacking the vehicle with the kids inside, Alan gets out of the other car. Even though it is pouring rain and Alan is standing perfectly still, no raindrops are seen hitting his solid, medium-colored shirt. It stays perfectly dry, even though there is nothing overhead that is shielding him from the rain. It is only after the scene cuts to him at the other car that the shirt is suddenly drenched. The rain is obviously CGI.
Continuity mistake: In the scene when Ellie is in the bunker trying to escape from the raptor, she stumbles along the floor gratings and is dragging her flashlight connected to an ankle bracelet. It appears securely connected as indicated by wildly bouncing and being flung around. She bashes her way through the door and slams it behind her, then she runs, suddenly free of the flashlight and connecting strap. If it was as securely attached as shown, she should have had a devastating fall when it was caught in the door, and the raptor would have won.
Factual error: At the beginning of the film we are shown an amber mine in the Dominican Republic. This amber is only 45 million years old, Hammond would never bother buying the amber from there as dinosaurs disappeared from the fossil record 65 million years ago.
Suggested correction: This is assuming that Hammond would restrict himself to a specific period of the earth's history, which makes no sense. Of course Hammond would also be interested in Paleogene or early Tertiary fossil blood! All the proto-birds, giant birds (just think about a Gastornis! What a sensation in a zoo!), not to mention giant mammals like the Megatherion, proto-elephants, proto-rhinoceroses.
There is absolutely no suggestion in Jurassic Park - film or book - that Hammond has any interest in any animals except for dinosaurs. We see no facilities for cloning extinct birds or mammals, nor are they mentioned in his promotional film. The post is correct.
It's specifically mentioned in the book that Hammond was buying huge quantities of amber, even museum-quality jewelry. He was likely getting hold of everything he possibly could to increase chances of finding blood-carrying insects.
There is also absolutely no suggestion that he wouldn't be interested. Surely these would make excellent alternatives / backups in the event he couldn't source enough mosquitos of the era he was most interested in.
As has been pointed out on this site before, inventing deux ex machina explanations for plot holes and factual errors does not invalidate them. Cloning non-egg laying mammals would require vastly different technology to that seen in Jurassic Park. Nowhere in the film is it indicated that Hammond is interested in anything except dinosaurs, nor that he is in any way equipped to clone anything but them.
Hammond buying up any mosquito-containing amber is not a plot hole. He didn't say he wanted exhibits from 45 million years ago, but he also didn't specifically say he wasn't interested. Lack of a statement in a film is not a plot hole.
Continuity mistake: When Grant shoots at the window in the control room, and we see the holes, they are holes from rifle bullets. But the shell casings on the floor is from a shotgun. And yes - shotgun shells do exist with one big slug in them, but then the holes in the glass would be a lot bigger.
Continuity mistake: After Nedry has sprayed the shaving cream on his hands, (and after placing it on the pie) we see a sideview shot where he lowers his hands to his sides. The shot changes to the front and his hands are up again, drying his hands off with a napkin. It was too fast to move his hands.
Other mistake: When Alan, Lex and Tim are climbing over the perimeter fence and the buzzer begins to sound, Alan and Lex have come off the fence on the other side and Tim loses his footing further up on the fence. He begins to pull himself up, but in the very next shot, a person is seen coming down the fence closer to the ground in khaki shorts and boots. Tim hasn't moved from his position further up, so it can't be him, and Alan and Lex were already on the ground, and did not have khaki shorts on. (00:43:15)
Continuity mistake: When Alan and the others are with the sick triceratops the sun changes between shots.
Revealing mistake: When the baby dino is hatching you can see light from a hole below the egg. This allowed them to push the fake dino through the fake egg shell.
Continuity mistake: As Dr. Settler is examining the triceratops, her left hand is very close to the dinosaur's left eye. After the cut, her left hand is nowhere near the dinosaur's eye. (00:48:00)
Continuity mistake: When the five characters start to leave the helicopter upon arrival on the island, Richard Attenborough is not sitting opposite Jeff Goldblum as he was moments earlier as the helicopter descended to the pad.
Suggested correction: Perhaps he just wanted to exit the helicopter first, so he switched places when the helicopter had touched down. You can see they had already undone their seatbelts, so they had time to move around before the door opened.
Revealing mistake: Wile driving away from the dinosaur Malcolm tells the driver to go fast. The stunt driver is very noticeable - he has a bigger head and way more hair than the actor.
Other mistake: While being chased by a T-Rex, after it breaks a trunk the digital dinosaur runs behind the car. There's a couple of shots of the people in the moving car and the next time we see the dinosaur angle the background clip is the very same one used before.
Continuity mistake: When Grant nearly passes out after first seeing the Brachiosaurus, he sits down on the grass. In the following shot, he is shown kneeling.
Continuity mistake: After the kids have greeted Hammond, everyone is outside the building waiting to see the vehicles. In the first angle they are several meters to the right of the stairs. When the angle changes they have moved back and are standing closer together.
Continuity mistake: In the scene from behind Dr. Grant we can see the cow being lifted straight up. You can see that the cow is rather close to Dr. Grant. Then the scene cuts and the cow is already in the middle of the top of the Velociraptor paddock. Judging from the distance between Dr. Grant and the paddock from the previous wide-shot, and the fact that Dr. Grant made no big moves, the crane couldn't pass that distance between the two shots. (00:27:35)
Other mistake: The kid who at the dig site in Montana says "That doesn't look very scary" is so far from the screen and behind all the other spectators that he can't possibly see the picture on the screen. And even if he could, it doesn't look anything like a six foot turkey.
Continuity mistake: In the scene with Dr. Grant and Lex standing nose-to-nose with the T-Rex, the dinosaur sniffs at the humans, then turns its attention to pushing the Explorer around as Grant and Lex scramble for safety. When the T-Rex starts pushing the Explorer, a profile shot shows that the monster's foot is no more than two yards from the vehicle; yet, in the immediate next shot from the monster's point of view, the T-Rex is obviously positioned 10 or 15 yards away from the Explorer, much too far away to be pushing the vehicle.
