The line comes from Deidara, a member of the Akatsuki in the Naruto manga and anime franchise. He creates explosive clay sculptures and uses “Katsu” as the spoken command that detonates them. The Japanese word can convey an explosive release in this context. Short extracts of the command spread through anime edits, character compilations, memes, and fan videos because the shout is concise and easy to synchronize with visual impacts. It remains closely associated with Deidara's theatrical approach to combat and his obsession with explosive art.