This clip refers to Ryomen Sukuna and Mahoraga from Jujutsu Kaisen, the manga by Gege Akutami and its anime adaptation. Moments involving Sukuna and Mahoraga became especially popular in fan edits and reaction posts because of the series' intense fights and high-stakes power scaling. Online, the yell is reused as a quick cue for overwhelming force, danger or a dramatic turning point. Its popularity lasts because even a tiny snippet is instantly recognisable to anime fans and fits short-form video pacing very well.