The sound comes from The CW, the American broadcast network whose promos carried the Dare To Defy slogan in the mid 2010s. Short sonic logos like this were made as station identification, giving promos for different series a single recognisable sign off that viewers would learn by repetition. Clips of network idents later circulated on soundboards, where this one survived less as advertising and more as a reusable broadcast hit. Editors still reach for it when they want a clip to sound like it aired on television.