Some of the dinosaur sounds in Jurassic Park were created from samples of tortoises mating.
The Spielberg classic is often praised for its use of groundbreaking visual effects and audio, but Gary Rydstrom – the film’s sound designer – revealed the origins of the velociraptor’s cries.
He told Vulture: “It’s somewhat embarrassing, but when the raptors bark at each other to communicate, it’s a tortoise having sex.
“I recorded that at Marine World… The people there said, ‘Would you like to record these two tortoises that are mating?’
“It sounded like a joke, because tortoises mating can take a long time. You’ve got to have plenty of time to sit around and watch and record them.”