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27 Facts That Will Make You Appreciate "Jurassic Park" Even More

As Samuel L Jackson would say, "Hold on to your butts."

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2. The T. rex was not supposed to break the glass on the Ford Explorer.

Universal Pictures

The breaking of the Ford Explorer's sunroof was a complete accident, but resulted in some genuine screams from Joseph Mazzello (Tim) and Ariana Richards (Lex).

3. One of the film's most suspenseful moments was created by strumming a guitar string.

Universal Pictures

Before it makes its first appearance, the T. rex's presence is felt through a plastic cup of water, which shakes as it gets closer. To create this effect, a guitar string was attached under the dashboard beneath the glass. The string was then plucked in a similar pattern to the T. rex's footsteps.

4. Steven Spielberg purchased the film rights to Jurassic Park six months before it was published.

Michael Critchton

While developing the screenplay for ER with Michael Crichton, Spielberg found out about Crichton's plans to write Jurassic Park. Immediately after, Spielberg influenced Universal to purchase the film rights.

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5. And the decision to have Richard Kiley provide the voiceover in the park vehicles was made in Crichton's novel.

Universal Pictures

In Crichton's story, he specifically mentions that the Jurassic Park audio tour is narrated by Golden Globe-winning actor Richard Kiley. So of course Spielberg hired Kiley to provide the voiceover in the movie adaptation.

6. Plus Crichton's novel even provided an explanation as to why the triceratops was sick.

Universal Pictures

In the original book, we find out that the stones the triceratops (a stegosaurus in the novel) ate to help aid its digestion were located near poisonous West Indian lilac berries, which made it ill.

8. The helicopter scene foreshadows a very important part of the film's plot.

Universal Pictures

In the scene, Dr Alan Grant (Sam Neill) fashions a functioning seatbelt with only two latches and no latch plate. This foreshadows a later scene where the dinosaurs are suddenly able to breed despite all originally being female.

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11. And Jurassic Park earned $357 million in North America, and a total of $914 million worldwide.

Universal Pictures

That was enough for Jurassic Park to overtake E.T. and become the highest-grossing movie of all time. That is until Titanic surpassed it in 1997 and Avatar in 2009.

12. Sam Neill injured himself with a flare while filming.

Universal Pictures

The injury took place during the scene in which Grant uses the flare to distract the T. rex. According to Neill: "It [the flare] dropped some burning phosphorous on me, got under my watch, and took a chunk of my arm out."

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13. Ariana Richards won her role by screaming the loudest.

Universal Pictures

To cast the character of Lex, Spielberg auditioned a number of girls and asked them to record their screams. Richards' on-tape scream was the only one loud enough to awaken Kate Capshaw (Spielberg's wife) and send her running down the hall to see if her children were alright.

14. And the casting of Joseph Mazzello led to Spielberg switching the ages of Lex and Tim.

Universal Pictures

Initially Mazzello screen-tested for Hook, but he was turned away by Spielberg for being too young. Promising to get him in a movie that summer, the director then cast 9-year-old Mazzello as Tim in Jurassic Park. This proved slightly problematic, as in the original novel Tim is the older sibling. And since Spielberg refused to cast someone so young for the character of Lex, the decision was made to switch their ages.

16. Plus there's a slight technological slip-up when Nedry is communicating with the dock via webcam.

Universal Pictures

If you look closely, Nedry's communication link to the dock is actually just a QuickTime video playing on screen. You can even see the time bar moving along the bottom of the screen as it plays.

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17. A crew member almost died while they were building the animatronic T. rex.

Stan Winston

Prior to filming, the T. rex animatronic had to be enclosed in foam rubber that would resemble the dinosaur's skin. According to Alan Scott, one of Jurassic Park's mechanical designers, there was a whole section in the middle that could only be reached by crawling into the animatronic while it was powered up in a particular position. If the power went off for any reason, the head of the T-Rex would move and cause all of the hydraulic cylinders and sheets of metal inside to be in the pathway of the crew member's body. As luck would have it, the power went off in the entire studio while Scott was inside working. But fortunately he was able to avoid all the moving metal parts and escaped unscathed.

19. The idea to have Mr DNA explain the science behind Jurassic Park was the result of a sarcastic comment.

Universal Pictures

According to screenwriter David Koepp: "I remember Steven [Spielberg] and I were wrestling with that very issue, about the DNA, and one of us said, 'What are we supposed to do? Have a little animated character called Mr DNA?' And the other one said, 'Yes! That’s exactly what we’re going to do!'"

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21. The hungry raptors in the kitchen scene were played by special effects designers in elaborate costumes.

Stan Winston School, Universal Pictures

The suits were designed by placing raptor drawings over various images of a designer, followed up by a body cast and a full sculpture of the final form. To fit inside the suit, the designer had to bend over, in a pose similar to that of a skier, for up to four hours at a time during filming.

22. And while filming, the T. rex was nothing more than a man waving a long stick with a drawing of the dinosaur's head attached.

Universal Pictures

While the first T. rex scene used a mixture of animatronics and CGI, the ending required the dinosaur to be completely designed on a computer. So the actors would know what they were screaming at, the crew built what Spielberg called "barber poles", which were the long poles with a T. rex face attached to them.

23. The last few days of shooting were disrupted by one of the strongest and most destructive hurricanes to hit Hawaii.

Universal Pictures

On the last day of shooting, Hurricane Iniki made landfall at the film's central location of Kauai. Funnily enough, while most of the 130-strong cast and crew waited out the storm in their hotel, Richard Attenborough slept soundly through the whole ordeal.

24. Jeff Goldblum and Laura Dern began a romantic relationship after meeting on set.

Universal Pictures

The two sweethearts also got engaged after Jurassic Park, and they stayed together for two years before eventually splitting up.

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25. Spielberg and Crichton saw themselves represented in the characters of Hammond and Malcolm.

Universal Pictures

Spielberg saw many parallels to himself in Hammond's desire to dream of bigger and better things. On the other hand, Crichton said that his views on science and genetic engineering were largely reflected by Malcolm's voice of reasoning. Their diametrically opposed views are also shown by the contrast of Hammond's all-white attire and Malcolm's black outfits.

27. Spielberg decided to change the ending with just a few weeks left of production.

Universal Pictures

The original ending had one of the raptors killed after getting stuck in a T. rex skeleton that crashes to the ground. But after seeing the success of the T. rex sequences, Spielberg was inspired to bring back the gigantic dinosaur for one last heroic appearance.