The tune is Think!, the theme music written by Merv Griffin for the American quiz show Jeopardy!, which first aired in 1964. It was originally played while contestants wrote down their Final Jeopardy answers, and its ticking rhythm became shorthand for thinking under pressure. Clips of the full, longer version spread through YouTube compilations, reaction videos and memes, where the familiar melody now signals any awkward wait, not just a quiz. Its instant recognition keeps it useful decades later.