The setup’s fiendishly simple.
Throw a few characters together, trap them on an island - then fill that island with rampaging dinosaurs.
Blockbusters would never be the same again, but it’s worth remembering there’s only six minutes of CGI in this, its supposed coming-out party.
Unleashed in 1993, Jurassic’s a classic not because of the computer whizzery, but Steven Spielberg’s eye for stomach-clenching peril and telling character moments alike - we get to know the dino-fodder before they hit the menu, so the resulting buffet is all the more intense.
Add to all this a succession of set-pieces most filmmakers would give their left viewfinders for, and you have one of the big screen’s very greatest thrill-rides.