The clip comes from the Paleosound library of dinosaur inspired effects, where thumming refers to the low throat and body vibrations large predators are imagined to make. Unlike a classic Hollywood roar, this style became popular online because it feels more physical and believable, and creators reuse it across dinosaur documentaries, fan edits and gaming videos. Its long rumble makes it easy to loop or layer under other effects, which is why it keeps appearing in prehistoric scenes and meme soundboards.