The tune comes from Jeopardy!, the long-running American television quiz show where contestants answer in the form of a question. Its thinking music, known as Think, plays during the Final Jeopardy round while players write their responses, and its ticking rhythm has become shorthand for waiting under pressure. Clips of the 15-second version spread through YouTube quizzes, TikTok challenges and reaction videos, where creators reuse it whenever a countdown is needed. It endures because almost everyone recognises the melody instantly, even without seeing the show.