Here's Johnny originated as a catchphrase from The Tonight Show, where announcer Ed McMahon introduced host Johnny Carson, before Jack Nicholson repurposed it in Stanley Kubrick's 1980 horror film The Shining. In the film, his character Jack Torrance shouts it while breaking into a bathroom, turning a cheerful television greeting into a terrifying threat. The scene became one of horror cinema's most quoted moments, and the line spread through parodies, trailers and internet memes, keeping it instantly recognisable decades later.