Cash Cab began as an American television game show in 2005, hosted by Ben Bailey and filmed in a New York City taxi cab. Unsuspecting passengers were picked up and offered cash for answering general knowledge questions during their ride, with the show's bright theme music becoming closely tied to that surprise format. The format was later adapted in other countries, and clips of the show circulated online long after its original run. Today the jingle is mainly recognised as shorthand for a quiz, a trivia challenge or a surprise test.