10 Things You Didn't Realise Inspired Iconic Movie Voices

The sound operator of Jurassic Park, Gary Rydstrom, spent months recording and fusing different animal sounds to find the perfect cry for each dinosaur. The Brachiosaurus' roar was a combination of donkey and whale cries. The Dilophosaurus' chirps were from a swan, a hawk, and a howler monkey. The Velociraptor's screeches were from walruses, geese, dolphins, and... erm... copulating tortoises. In case you were wondering, (because, let's be honest, you were), the tortoise sex sounds were used when the Raptors call each other.

For the Tyrannosaurus, Rydstrom merged the sounds of penguins, tigers, a whale's blowing its blowhole, alligators, and his own Jack Russell, Buster. However, Rydstrom said the key sound for the T-Rex's scream was a baby elephant. When Rydstrom recorded an infant elephant playing, it let out a piercing shriek, which he thought sounded perfect for the T-Rex's roar.

Weirdly, the elephant's handlers said the animal never made that sound before in its life! No matter how many times Rydstrom coaxed it to recreate this deafening wail, the elephant refused. Good thing he was there to record it since it helped create one of the coolest monster sounds in cinema.