Alt and F4 together form one of the most recognisable keyboard shortcuts in Windows, used to close the active window without reaching for the mouse. That shared familiarity is what turned it into a short-form video joke, where creators use the reference to signal that a conversation, game, or argument is finished. On TikTok, it often appears at the end of a clip as a visual and audio punchline, letting viewers instantly understand the exit without extra explanation. Its simplicity keeps it reusable across gaming, reaction, and comedy edits.