The warning comes from aircraft Ground Proximity Warning Systems, developed in the 1970s to reduce controlled flight into terrain accidents. The whoop whoop tone and pull up command alert pilots to close proximity to the ground and demand an immediate climb. Recordings and simulator recreations spread through aviation videos, flight simulator communities and disaster documentaries, then moved into meme edits as a universal signal for impending failure. Its continued use relies on that real safety history, making even a silly crash feel suddenly serious.