This sound circulates online as a distressed T-rex clip linked by uploaders to Rexy, the Tyrannosaurus rex familiar from the Jurassic Park films. Rather than a triumphant hunt roar, it is shared for the opposite moment, when a giant predator is wounded, trapped, or losing a fight. Creators reuse the longer sequence in dinosaur edits, roleplay videos, and meme remixes because it provides a ready emotional arc without dialogue. Its popularity comes from that contrast, turning an iconic movie monster into a character audiences can pity.