The line comes from the 1993 film Jurassic Park, during Dennis Nedry's attempt to bypass the park's computer security and steal dinosaur embryos. The singsong denial quickly became one of the film's most quoted jokes, and it later spread online as a short reaction clip for memes and videos about locked accounts, wrong passwords and denied entry. Its appeal has lasted because the delivery is instantly recognisable, even to viewers who have not seen the film, and because almost everyone has experienced the frustration of being told no by a computer.