One of the most pivotal scenes in the film occurs about halfway through. During a strong thunderstorm on the island, the park’s electricity goes out, cutting the power to the electric fences that contain the genetically-created dinosaurs. The tour cars, which are run by an electric track, are stopped at the most dangerous place on the tour---the T-Rex paddock.
As with all scenes that showed dinosaurs on screen, a lot of work went into the making of the scenes. This scene in particular, however, had some very interesting aspects to it. First of all, the scene was shot in a sound stage. Earlier in the film, the tour car passed the paddock with a no-show from the T-Rex. That scene was filmed on location on Kaua’i island, Hawaii. However, due to this scene taking place during a storm, the production crew needed to control the elements, and thus they re-created the T-Rex paddock and surrounding areas from Hawaii for the scene (Jurassic Park DVD).
Written by Anthony Watkins
BELOW you'll find the "T-Rex Breakout" scene from Jurassic Park. The clip starts with the cup of water vibrating from the T-Rex's footsteps.
Jurassic Park. Screenplay by Michael Crichton and David Koepp. Dir. Steven Spielberg. Special Edition DVD. Universal Pictures, 1993.