The Triple Kill callout comes from multiplayer shooters and arena games, where an announcer rewards players for eliminating three opponents in quick succession. As kill streak announcements spread through FPS, MOBA and fighting game culture, players began ripping the shouts for montages and memes. The KO addition gives it a fighting game finish, blending shooter streaks with knockout drama. Online, it is now used far beyond ranked matches, appearing in edits, streams and short clips whenever three successes happen back to back.