I had read a couple of books by Crichton when I happened to be in a bookstore and saw that hardcover book called Jurassic Park with the Tyrannosaur skeleton head on the cover. I picked it up because, having been a life long nut on dinosaurs, and with previous experience reading Crichton's work, I knew I'd enjoy this book. Read the entire book the next day. Easily one of the best books I've ever read.
The movie came out a couple years later. By that time I was out of A&M by 4 years. Having read the book, I was familiar with what I was going to see in the movie. So imagine my surprise when Spielberg was able to elicity a lot of adrenaline and even heart-pounding fear during portions of that movie. When I got home, I recall having to walk over to the mailbox cluster which was located near some wooded area in Pecan Grove (Richmond, where I had my first house). I had this thought, WTF would I do if a freaking Tyrannosaur poked its head out from all those big trees?
There were portions of the movie that I really didn't care for, but all in all, JP is a classic movie that I believe will never be topped. And as I recall, there were some sequences in the original book that were not included in the original movie, but found their way into The Lost World movie (for instance, the scene in TLW where the Tyrannosaur chases the group from the camp into the waterfall, and sticks its tongue in there to try to grab someone, was right out of the book, but in the book it was Tim and Lex).