Barney Stinson, played by Neil Patrick Harris in the CBS sitcom How I Met Your Mother which ran from 2005 to 2014, made Challenge Accepted one of his recurring catchphrases. He would use it whenever another character suggested something was impossible, even when nobody had actually challenged him. Clips and GIFs of the line spread widely during the show's run and after, becoming a shorthand online for voluntarily taking on a dare. It remains popular because the phrase fits gaming attempts, bets and everyday boasts.