Black Flash comes from Gege Akutami's Jujutsu Kaisen, which began serialization in Weekly Shonen Jump in 2018 and received a television anime adaptation in 2020. In the story, it occurs when cursed energy is applied within an extremely short interval after a physical strike, distorting space and greatly amplifying the impact. The concept spread through anime clips, fan edits, gaming montages, and short-form videos. Its combination of precise timing, explosive force, and recognizable visual energy keeps it useful for dramatic impact edits.