The way the T-Rex attacks the tour vehicle makes sense given it's status as a predatornote Not counting the Roar Before Beating, which is illogical but standard with movie monsters; it doesn't know what a car is, and likely assumes it's some sort of armored dinosaur/animal. So it does the most logical thing: pushes it onto its back and attacks its (hopefully) softer belly. When this doesn't work (since the vehicle is metal), the T-Rex then goes for the vehicle's tires (which it probably assumes are the feet).
The film presents a thinly veiled aesop on the dangers of relying too much on technology — which is exactly what modern films have done with the pioneering technology behind the special effects in this film. Ironically, due to its combined use of animatronics and CGI, Jurassic Park has aged very well since its début in 1993 and looks much more realistic than almost all other dinosaur-using movies, including those that rely very heavily or only on CGI special effects.
The very last line Grant's Chekhov's Lecture in Jurassic Park about respecting raptors and their power as predators proves to be an aesop for the franchise's carnivorous dinosaurs in general, as every person who openly disrespects, exploits, or abuses them is literally Eaten Alive, often very slowly.
Dr. Grant: "The point is, you're still alive when they start to eat you. So try and show a little respect, okay?"
Probably unintentional, but the second movie makes for a fantastic warning against the dangers of irresponsible activism.
In the case of inconsistencies with modern dino knowledge (like the absence of feathers), it is mentioned that Dr. Wu had been mixing and matching DNA, then just waiting to see what grew out of it. If it didn't "seem" right based on current knowledge about dinosaurs, he'd go back to the drawing board, and try a few revisions. If Wu had seen some feathered dinos well before anyone knew about them, then why wouldn't he consider it a "glitch"? There's even a line somewhere in the novel about the JP dinos only being as close to actual dinos as they can guess from modern scholarship by folks like Dr. Grant. It seems Crichton wrote in his own defenses against Science Marches On!
In the first film, Nedry has a photograph of J. Robert Oppenheimer taped to his monitor. This is amusingly appropriate considering that Oppenheimer, who worked on the Manhattan Project, felt similarly about the Atomic Bomb that many of the main characters in this movie felt about playing with dinosaur DNA.
In Trespasser, John Hammond himself even mentions the parallel significance of the impact their work would have on the world with the Bomb.
Hammond: We were planning to conquer time's power over life, its power to extinguish and erase. It would change all our lives, as profoundly, as irrevocably as the atomic bomb.
The first film pioneered new special effects technology. Soon afterwards, films started relying too much on special effects and not enough on their human aspects. This parallels how John Hammond relied too much on technology to run the park and not enough on human beings.
A behind-the-scenes documentary revealed that the exchange between Dr. Grant and Ian Malcolm about the possible future of paleontology ("[I'm thinking] that we're out of a job." "Don't you mean extinct?") was based on a statement made by a member of the film's animatronics crew, who was expressing his fear that CGI would cause practical effects experts to become obsolete in the future.
Every biological inaccuracy shown by the movie and the book can be explained by the fact that the scientists who made the dinosaurs screwed with their genetics and may have even tailored them to fit the expectations of visitors. A nifty way of averting the pitfalls of such a work when Science Marches On. In fact, Dr. Wu points this out to Masrani in Jurassic World.
Dr. Wu: Nothing in Jurassic World is real! If we used pure DNA, a lot of these animals would look and act very differently. But you didn't want 'real', you wanted 'more teeth'! "
Jurassic Park's Science Marches On-style of genetics offers some Fridge Horror as well. Considering that the dinosaurs look a bit different and more accurate with each film, InGen may well have euthanized the animals that were proven to be scientifically inaccurate, only to replace them with improved ones.
Everyone derides the films' raptors for not having feathers, thanks to Science Marches On. But the lack of feathers could actually be taken for a sign of stress in the animals: pet birds such as parrots will often pull out their own feathers if they're plagued by anxiety and boredom. The raptors were both stressed by their unnatural circumstances - crowded into woefully-small enclosures, devoid of proper parenting, their social ranks disrupted every time Hammond ordered up a new batch to add to the collection - and bored out of their skulls without the opportunity to roam freely and hunt.
The film's Velociraptors have, let's face it, a LOT wrong with them. The size we can chalk up to being a different species mislabeled, but each film depicts them differently, and distinctly un-feathered, something we now know is quite inaccurate. So... in the third one, they gave the male raptors... mohawks. Of feathers. Okay, sure, they're trying. But maybe these changes in the appearance and physiology are the raptors' DNA overtaking the amphibian DNA used in their creation. Each new generation of raptors is becoming more "real", and in a few decades, Isla Sorna will have fully-feathered, scientifically accurate raptors.
Sam Neill said in a making-of for JPIII, when describing the new raptors, "It's almost as if they've evolved."
Not to mention that explains why the raptors became less and less psychotic.
Well, another explanation for their stabilized behavior could be because they were raised by other raptors. With a lot of social creatures in real life, especially ones that are raised without a peer group or parents to teach them social behaviors, they will often grow up displaying erratic and unpredictable behavior. Wild animals raised in captivity can have this mitigated by handlers who know what they're doing, and know what wild behaviors they should be learning and how to handle them (with mixed success), but the raptors in the first movie didn't have that. No one in the first movie knew for sure what any of the dinosaurs' natural behaviors should be and probably just assumed that all behaviors would be instinctive, which backfired as horribly as everything else.
The disorganized behavior of the animals being completely unnatural was a major point of the second book, which spent a fair bit of time on the fact that many of the dinosaurs should have had a lot of learned social and cooperative behaviors and lived in family groups, whereas the artificially created dinosaurs were fighting among themselves and the entire ecosystem was collapsing.
This is further explored in Jurassic World with Owen Grady's four imprinted raptors: Blue, Charlie, Delta, and Echo. Owen is a noted animal behaviorist from the U.S. Navy and does everything he can to raise his raptors "right", which basically involves doing everything the polar opposite of the original park. This includes making sure that they're hand-reared together since birth, given lots of enrichment and social interaction, a large and spacious enclosure, and constant attention from Owen, who functions both as a Parental Substitute and pack alpha. In contrast, the Indominus rex has been forced to live in complete isolation in a paddock that's far too small for her massive size, is fed only via crane because she attacked the feeders, killed and ate her sibling, and makes multiple attempts to escape or at least test her surroundings. All of this is almost identical to the living conditions of the park's original raptors. Guess who's far more well-adjusted and stable this time around?
Tim's idolization of Dr. Grant goes to very subtle levels — he's even wearing the same outfit (denim button down shirt, bandana around the neck, white khaki pants, and a brown belt), with minor differences (Tim's shirt's unbuttoned, different color bandana, and shorts instead of pants).
In a crossover with Fridge Horror, if Gennaro had been in either of the stalls next to him when the T. rex crashes into the bathroom, the walls would have collapsed on top of him, possibly saving his life.
Had they collapsed on top of him, the T. rex may have rooted around in the debris. If this had happened, she may have found Ian instead of Gennaro!
A final draft of the script and the junior novelization actually write it happening this way. Gennarro still gets eaten while Malcolm is spared, but it lacks the Black Comedy of the actual scene in film.
The "six-foot turkey" comment can hit a sort of "Fridge Humor" note since, in real life, Velociraptors were roughly turkey-sized.
And now we have Utahraptor, a giant dromaeosaur (well, giant by dromie standards) about the same size as Jurassic Park's creatures — same height, but a good bit longer than the JP raptors and weighed about twice as much (about the same as a polar bear).
In fact, there are now two known species of dromaeosaurs matching the Jurassic Park raptors for size, and one each to the areas attributed to them: there's Achillobator in Mongolia and Dakotaraptor in North America. A retcon could very well have the skeleton dug up at the beginning of the first film as being a Dakotaraptor. (Based on the rules of cladistics and taxonomy, though, they'd still be called Velociraptor in-universe since that name would have precedent—the only exception ever to this in real-life was Tyrannosaurus over Manospondylus.) Not to mention that Grant would have been more or less influenced by paleontologist Gregory S. Paul's then current cladistics, which had nearly every dromaeosaur besides Dromaeosaurus itself placed in the Velociraptor genus.
The Dilophosaurus displays some rather odd behavior unbecoming of most predators. Rather than stealthily stalk Nedry, she openly regards him while displaying zero aggression. She only goes into attack mode once he turns around and crawls on all fours. This is likely because she took his behavior as that of a wounded animal, causing her predatory instincts to kick in.
In the script, she does this after Nedry throws a rock at her, making it a provoked attack.
In reality, Dilophosaurus was about ten feet tall. This is another layer of fridge brilliance; the one we see in the movie is an infant, who has no experience with hunting and killing prey. She was initially hesitant because she wasn't quite sure what to do, but then her predatory instincts kicked in...
Her behavior is clearly not predatory, though: by opening her frill and hissing at Nedry, she's trying to scare him, which suggests either self-defense or combat aggression rather than hunting.
Exactly so, and moreover, it was provoked. When Nedry first encounters the dilophosaurus, she's inquisitive and more or less just curious; there's this new creature that looks funny and keeps making odd noises. But then Nedry makes his fatal mistake: he puts up the hood of his rain slicker. The yellow hood, which looks very much like the display frill of the dilophosaurus, particularly backlit as it is by the Jeep's headlights. So far as the dilophosaurus could tell, Nedry was threatening her, and empty threats aren't really a concept most animals are acquainted with. He threatened her, so he started the fight. When he turned and ran, she realized she could take him, so she did.
In Jurassic Park, Muldoon is about to kill a raptor when another appears on his side and attacks him. In The Lost World, a raptor is about to kill a human (Malcolm) when another (Kelly) appears on his side and attacks her. Clever girl(s).
Although Muldoon is clearly supposed to have died in the film, the Expanded Universe material has him still alive in Jurassic Park: Raptors Attack II. There is a simple, if horrific, explanation for him surviving: The Big One and the other raptors simply were not hungry, having completely devoured Arnold save for an arm. In the wild, a lion will not hunt for prey if it is not hungry, but they will chase you off their turf or attack you if you are on it. The same logic could be used for the raptors.
Actually in what can only be described as a hilarious ironic fate the truth is in Muldoon's statements of always being present for anything related to the Raptors and the fact he is in view of them... They KNOW him, he is there for feeding, moving, medical things, etc,.. He is their one constant in life. They likely viewed him as part of life and while they were fine mauling him didn't want to kill him, just teach him who is dominant now. Years later Owen does the same thing but ensures its in a positive light instead of a dominating scary one.
The raptors' ability to open doors, which Ellie herself poo-poos just before one is shown doing so on-screen, is foreshadowed by Ellie herself encountering one inside the generator-bunker, the door of which was closed when she got there. She was too freaked out by finding Arnold's arm to stop and wonder how the raptor that attacked her had gotten inside, in the first place...
The entire film is Malcolm's statement of Chaos theory in effect. Nedry turned off all the systems, which turned off the electric fences allowing the dinosaurs to escape at the very instant the tour cars were driving past the T. rex. Grant, when trying to save Tim from the tree, accidentally turned the wheel making it so that the car could fall through the branches. Sattler rebooted all the systems just as Tim was climbing down the electric fence, thus shocking him. Nedry, meanwhile, hit a sign causing him to not know where the docks are, causing him to drive towards the Dilophosaurus, and due to the rain storm, be unable to steer correctly, causing his car to get stuck. He then trips due to a small waterful caused by the rainstorm and lose his glasses. AND due to the dinosaur's DNA having gaps, they had to fill those gaps with that of another animal's. Using frogs allowed them ample opportunity to reproduce.
In describing chaos theory, most use weather as a perfect example. That's true in this case. If not for the storm, Nedry likely would have given the embryos over to his contact at the docks and been back in his seat entering the reset command before anyone knew anything was wrong. If anyone did notice the phones were out or the internal security blanked out for a few minutes, he can just brush it off as glitch #152. In fact, this was explicitly stated in the novel: Nedry planned for everything, except for that storm!
As pointed out in a YouTube comment, of all things, in the scene in The Lost World when the parent tyrannosaurs are first heard, the very first thing Malcolm does—before even asking if there's any way to contact the trailers—is turn off the kerosene lantern in the High Hide. This isn't just a smart move for if you don't want to be seen: he was remembering his very first encounter with a Tyrannosaurus in the previous movie, and what had attracted Rexy to the first car and nearly killing Tim and Lex—they were shining a light around and it drew Rexy's attention.
While landing in the helicopter, Dr. Grant tries to buckle his seat belt unsuccessfully, since both ends he held up were the receptacle (i.e. FEMALE) part of the belt. So what does he do? He simply ties the ends together to make it work. Later during the film, he realizes that some of the supposedly all-female dinos on the island have changed sex, become male, and mated. Life finds a way, indeed.
John Hammond's essential character is established moments before we actually meet him. When we actually first see him, he's avuncular, friendly and enthusiastic — however, he arrives via landing his helicopter very close to a dig site without alerting anyone that he's coming, thus not giving them any time to prepare and risking damage to the valuable and fragile fossil they've just arrived. For all his kind-heartedness, he's very careless — something which will be proven by the catastrophe at Jurassic Park.
Hammond's line about him not blaming people for their mistakes but do asking them to answer for them, makes a lot more sense after Fallen Kingdom revealed that his old friend, Benjamin Lockwood, who helped Hammond co-found Jurassic Park and develop the cloning technology, cloned a human (his deceased daughter in this case) , before Jurassic Park was even created, a flat-out illegal action in most of the planet, he couldn't blame Lockwood for it, after all, Lockwood just wanted his daughter back, but he did made the latter pay for it by cutting off his ties with him forever.
The whole "Don't move and they won't see you" part regarding the T-Rex seems to be a mistake at first with what is knows about the dinosaurs, but if one recall what the dinosaurs where spliced with, it makes perfect sense. It's not the dinosaurs that got motion-based vision, it's the frogs.
Hammond says several times as he is showcasing the park that he "spared no expense". However, in his first dispute with Nedry, Nedry indicates that he was hired with a low bid and that he's not getting paid what he's worth. It implies that despite Hammond's insistence to his guests, he did in fact cut some corners.
This also adds an element of irony to his belief that people pay for their mistakes. Dennis Nedry was a mistake that John Hammond literally refused to pay for.
If one looks closely at the footprints leading away from the hatched eggs Grant and the kids find in the first movie it can be noticed the tracks only have two toes. The only species in the park with that number of digits on the feet are the Velociraptors. This is actually plausible given it was stated not only did the park originally have more raptors, but also that they had their own paddock before being moved to the container they were in. It could be that very same old raptor paddock which Grant and the kids were moving through. One of the pack members killed by "The Big One" could have turned male and had a clutch with one of the females, this clutch going unnoticed when the remaining three raptors were moved to the smaller enclosure. Not only does this mean the dinosaurs were breeding months before the inspection guests were invited, but that there actually are more raptors on Nublar than the film's three.
Licensed literature for the film states that the hatched eggs were those of the Gallimimus young, which have similar feet to the Velociraptors.
It can be universally agreed on that Nedry is a massive Jerk who brought about his own doom, but take a moment to think of what might have happened if he had never shut the park down like he did. If the events of the first movie/film had not happened like they did (with a relatively small start-up staff and a handful of guests), then such events might have happened much further down the road, when Hammond had opened the park to the general public. And Jurassic World showed this exact scenario.
To say nothing of the fact that the island itself was a ticking time bomb literally waiting to explode when no one expected it.