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For nerds of a certain age, the sounds of Jurassic Park are burned into the mind: There's the wail of the T. rex, the dulcet tones of Jeff Goldblum, and the terrifying screams of the velociraptors hunting the kids in the kitchen:

With no living velociraptors for reference, the filmmakers used something else to get the sound right. They recorded turtles having sex, and threw in some annoyed horse sounds for good measure. Lucasfilm sound designer Gary Rydstrom recorded the sounds at Marine World, using them to construct the raptor "language."

Don't believe it? Watch this and this for reference (but maybe don't watch them at work).

Source: CNET.

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