Continuity mistake: When Muldoon and Hammond are talking about the tropical storm the first time we see a shot of Nedry's workstation behind them and there's hardly anything on the floor, but a few minutes later when Hammond says their lives are in Nedry's hands suddenly the floor is covered in trash.
Continuity mistake: Right after the "Objects in mirror are closer than they appear" shot, the dinosaur breaks a huge trunk that falls forward. A shot later note behind the dinosaur and the huge trunk is nowhere to be seen.
Continuity mistake: When Ellie runs away from Muldoon towards the Power Station, she climbs over a tree and watches a path in front with two more fallen trees on the way. When she is about to jump over the first one some branches suddenly appear on the close-up to help her do the jump. Furthermore, when she is about jump over the second tree the close-up is a repetition of the previous tree.
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.
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.
Continuity mistake: When Alan and the others are with the sick triceratops the sun changes between shots.
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.
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 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.
Continuity mistake: After the first T-Rex attack, Tim's rover is still stuck in the tree, and Dr. Grant and Lex arrive at the base of the wall adjacent to a gushing storm drainage pipe. Dr. Grant assures Lex that he will return and goes to assist Tim. Whimpering, Lex clambers up to take shelter in the drainage pipe. However, there is now an inexplicable blue light glowing from deep inside the drainage pipe, illuminating Lex.
Continuity mistake: In the final rotunda scene, when the rex is chewing the first velociraptor, there is a skeleton piece (a herbivore tail) hanging beside it. In the next shot, when the second velociraptor jumps rex, this piece of the skeleton is no longer there.
Continuity mistake: When Nedry hears the Dilophosaurus and turns around, he's holding a tow cable. It's gone in the next shot.
Suggested correction: Between shots you can see how he releases the winch cable before turning.
Continuity mistake: The T-rex completely destroys the outdoor bathroom facility that the lawyer ran into. The lawyer is perched atop the toilet and the remaining damaged wall behind him is tilted backwards. When the camera cuts to a shot where the lawyer is seen from behind and the T-rex is just about to eat him, the wall is missing. When it cuts back to a front shot, the wall is back again.
Continuity mistake: When the car with Tim and Lex is turned over, mud flows into it and it's like they are going to drown. But when seen from the outside, next to the tracks is a firm gravel road, and Dr. Grant doesn't even sink in when he steps out of his car with the flare.
Continuity mistake: When Ian Malcolm jumps out of the jeep to wave the flare at the T-Rex, there is strange mark on his forearm. When he starts to run from the T-Rex, with his arm still in the air, the mark is gone.
Continuity mistake: When Lex saves Tim's life in the kitchen, she goes into shelter. When the Dinosaur chases Lex's reflection she is facing the dinosaur's face, but in the next shot her reflection has changed by 90°.
Continuity mistake: When the T-Rex escapes, the lawyer leaves the door open. Next scene, the door is closed. Then open, then closed again. Then open for Timmy to close it. Also, when the T-Rex escapes, he walks away between the trucks. The tail is already passed them. Then the girl turns the spotlight on, and the T-Rex is back to where it started. Hasn't crossed between yet.
