The Indominus Rex was created for Jurassic World, released in 2015, as a genetically engineered hybrid dinosaur designed to be larger and more frightening than the park's existing attractions. Its distinctive roar helped establish the creature as the film's main threat, combining familiar Tyrannosaurus sounds with other animal influences to feel both recognisable and unnatural. Clips of the roar have since circulated on soundboards, in fan edits and in reaction videos, where creators reuse it whenever they need an instant, large-scale monster sound without dialogue or explanation.