Did You Know: Dinosaurs and Guitar Strings

In Jurassic Park (1993), to simulate dinosaur footsteps, the glass of water sitting on the dash of the Ford Explorer was made to ripple using a guitar string that was attached to the underside of the dash beneath the glass.

In Michael Crichton's novel, John Hammond proudly says that the narrator on the prerecorded park tour is Richard Kiley. Later, Kiley was hired to play himself in that role for the movie; possibly the only instance of a celebrity appearing in a book, and then later cast as him or herself in the film version.