Black Flash is a technique from Jujutsu Kaisen created by Gege Akutami, where cursed energy is applied within a fraction of a second after a physical hit, creating a distortion of space marked by black and red lightning. Yuji Itadori becomes closely associated with the move during his fights, including his confrontation with Mahito during the Shibuya Incident arc. Clips of the impact circulate widely in anime edits and short videos, where the distinctive crack and surge are reused as a shorthand for an impossible, perfectly timed strike.