Jurassic Park

According to the behind-the-scenes book The Making of Jurassic Park: An Adventure 65 million Years in the Making, the infamous roar of The Tyrannosaurus' were a composite mix of a dog, penguin, tiger's snarl, alligators gurgle, and a baby elephants squeal . The very deep alligator vocals acted as the low-frequency element of the final roar. However, as Gary Rydstrom stresses, the key part of the sound is the high-frequency element: the baby elephant. Rydstrom describes how, during the recording session, the baby elephant only did the iconic "cute high-pitched scream" that forms the basis of every T. rex roar in the film once. "We kept trying to get it to do it again, and the handlers were saying, 'We never heard it do that before; that's a weird sound.'" As Rydstrom stresses, the introduction of the T. rex is a scene expressly planned around sound design. "I think maybe other directors would have had a shock moment where you see the T. rex show up out of the blue Spielberg was great in the T. rex scene by getting several minutes of tension because you knew what was coming. And you knew it because you heard it before you saw it it's nice when movies think about sound that way."

(at around 1h 3 mins) When they arrive at the T. rex cage right before the black out, we can clearly see the ground inside the cage is approximately flush with that outside the cage. But when the T. rex escapes and begins to terrorize the two trucks, the ground in the cage is shown to be at least 100 feet below where it was before.

When it says "A Steven Spielberg film" at the end of the movie, listen closely. You will hear the slightly modified five tones from Close Encounters of the Third Kind (1977).

The mainland Chinese release of the 3D version (the original version was not released there) deletes the following:

• The goat chunk splattering against the tour jeep and Lex's subsequent reaction.
• Gennaro in the T-Rex's mouth.
• Dr. Satler's discovery of Arnold's severed arm.
• The raptor pouncing on Muldoon.

Edited into Supergator (2007)