The sound comes from the Double Rainbow Guy video filmed by Paul Vasquez in Yosemite National Park and uploaded to YouTube in 2010. In it, Vasquez films two rainbows after a storm and reacts with emotional awe, repeating the phrase that gives this clip its name. The video quickly went viral, spawning remixes, parodies, and television mentions, and it became shorthand online for overwhelming wonder at nature. Years later, creators still reuse the audio because the genuine, unscripted reaction remains instantly recognisable and funny.