Jeopardy is the long-running American television quiz show created by Merv Griffin, first broadcast in 1964 and later syndicated for decades with host Alex Trebek. Its strict timed format made sound cues essential, with buzzers and tones marking correct answers, Daily Doubles and time expiring. As clips moved to YouTube, TikTok and soundboards, that time's up tone escaped the studio and became a universal reaction sound for quizzes, classroom games and edits where someone has simply run out of time.