There are a few pressures on a director that can be equal to those facing a pre-Lost World Spielberg.
Not only was he making a sequel to the then-highest grossing movie of all time, but his last film, the Oscar-winning Schindler's List, had been arguably his most critically acclaimed, and certainly his most serious work.
But despite going on to become the tenth highest grossing movie of all time, raking in $590 million, it had a mixed reception from both critics and public alike.
It was accused of overusing CGI, of lacking suspense, and as being — horror of horrors — "not very Spielberg." True, the feelgood factor so prevalent in Spielberg's earlier adventure movies was in relatively short supply.
There are many different elements in the movie Jurassic Park that make the movie interesting.
This film plays with the question What if dinosaurs were alive today?
But his trademark absent-father-redeemed storyline was played out with both the dinosaur characters (protective parent seeks lost baby T-Rex) and the human ones (Ian Malcolm grows closer to his daughter and to girlfriend/mother figure Sarah Harding). It also strongly reinforced his don't-mess-with-nature message.
Theme-wise it was certainly Spielberg, focusing on creatures out of their natural habitat (think Jaws, E. In this film, human interference brings the monster dangerously close to home, directly threatening the suburban family unit and by implication the viewers.
You cannot hear the fence later on in the movie when all of the power is turned off.
Also, in the scenes when they are being attacked by the T-Rex it is raining.