This video is a layer-by-layer breakdown of the iconic T-Rex roar from the first Jurassic Park. It's all explained in detail by the original sound designer, Gary Rydstrom.
Along with the lightsaber and Vader's breathing, it's quite possibly the most well known sound effect of all time and it's all because a baby elephant made a strange noise exactly one time ever.
There's also a Jurassic Park companion post on the INDEPTH Instagram that dives deeper into the T-Rex as well as the rest of the dinosaurs.
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