 The London Symphony Orchestra is making a Simpsons TV gag a reality. Come on, people. Somebody order the London Symphony Orchestra. It started as a joke in an episode of The Simpsons that aired in 1996. Do you know what's saying in the brain? We mostly know classical, but we could give it a shot. Years later, Cypress Hill tweeted the clip to the symphony, and it helped the hip-hop trio strike a deal for a one-night performance in London.