The phrase comes from the Cha Cha Slide, a line-dance track created by Chicago performer DJ Casper. An early version was made for an aerobics routine in the late 1990s, while “Casper Slide Part 2” was released in 2000. The song later became a major international dance hit and reached number one in the United Kingdom in 2004. Its spoken choreography remains common at parties, weddings, and school events, while the repeated directional commands also work naturally as cues for online reversal jokes and rewind edits.