I finally figured out the seat belt scene!

I always thought it was stupid early in the movie, where they're getting on the helicopter, and Grant can't get his seatbelt to buckle because someone designed the buckle for his seat wrong. So he's forced to tie the belts he has in a knot over his lap. I kept wondering, who would make such a poor design for a helicopter seat belt?

I didn't realize this was actually a visual foreshadowing for the film. Not until I read about it randomly on Quora. It's one of those movie trivia things that not everyone will pick up on unless someone points it out.

See, one of the themes in the story was that, despite all the animals in the park supposedly being female, some of them apparently mutated to either do parthenogenesis, or somehow changed their sex to become male (don't ask me how the African frogs their DNA was supplemented with could do this) and found a way to breed outside of human influence. (I personally thought it was bullshit, but obviously Crichton wanted to touch on the idea that no matter how hard we try to control something as dangerous as dinosaurs, they always find a way around it. I'll probably touch on it in another thread if I care enough to discuss it).

So in the scene, Grant finds himself with a pair of seatbelts that have two female belt buckle halves, instead of a properly-designed seatbelt that has a male half and a female half on the buckles, and he found a way to stay safe on the helicopter by tying the two female halves in a knot over his lap, symbolizing (without knowing it) the female dinos finding ways around human control.