20 Things You Somehow Missed In Jurassic Park
4. How The End Is Foreshadowed
Early in the movie, Dr. Sattler comments that "these are aggressive living things that have no idea what century they're in, and they'll defend themselves, violently if necessary". It's a neat line of foreshadowing but it also gives away how they can be defeated.
In Jurassic Park, whenever a character is caught by one of the dinosaurs in the wild, that's the end of them. Gennaro on the toilet, Muldoon in the jungle, even Nedry on the waterfall, all of them are made short work of.
However when they're able to take the creatures into man-man settings, like Tim and Lex in the kitchen, the escape in the jeep, or the final scene of the film, the humans are able to use their environment to survive.