The sound comes from The Car, a 1977 American horror film about a mysterious black Lincoln that terrorizes a small desert town with no visible driver. Its horn became one of the car's defining traits, sounding before attacks and turning an ordinary honk into a signal of danger. Clips and soundboard copies later spread online among horror fans and meme editors, who reuse the blast out of context. It remains popular because the tone is instantly recognizable, short enough for edits, and funny or menacing depending on placement.