Stripes is a 1981 American comedy directed by Ivan Reitman, starring Bill Murray as John Winger, a cab driver who enlists in the U.S. Army with his friend Russell. The line That's a Fact Jack became one of the film's most quoted catchphrases, repeated in a call-and-response style that fans adopted outside the movie. Decades later it spread through meme pages, reaction videos and soundboards as a shorthand for confident agreement, keeping the quote alive for viewers who have never seen the full film.