The warning comes from the Ground Proximity Warning System fitted to airliners since the 1970s, introduced after a series of controlled flight into terrain accidents. The system monitors altitude, descent rate and terrain closure and plays recorded voice alerts so pilots react without looking down. This pull up alert is the most severe level. Flight simulator recordings and cockpit videos later carried the phrase online, where editors borrowed its unmistakable urgency for gaming crashes and fail compilations, turning a real safety warning into a widely recognised meme cue.