The Tupolev Tu-154 is a Soviet three-engine jet airliner developed by the Tupolev design bureau, first flown in 1968 and widely used across the Soviet Union and Eastern Europe. Modern jet cockpits use ground proximity warning systems that issue a synthetic Pull Up command when terrain closure is too high. Clips of that warning spread through aviation forums, flight simulator communities and disaster documentaries, then into meme edits where the Tu-154 name became shorthand for a doomed Soviet-era flight and a last-second warning that comes too late.