The phrase comes from the ground proximity warning system fitted to commercial airliners such as the Boeing 737, which alerts pilots when the aircraft is too low with the landing gear not deployed. The warning is designed to be impossible to ignore during a critical phase of flight. Online, the clip has been picked up by aviation fans and flight simulator creators, who reuse the stark cockpit audio to add realism or comic urgency to landings, crashes, and near-miss edits, keeping a piece of real cockpit procedure in circulation as a meme sound.