Old helicopters have a distinctive sound that listeners recognise instantly, even without seeing the aircraft, because their rotors produce a slower, heavier chop than newer models. That recognisable texture is why short recordings of them circulate widely among video editors, gamers and meme makers, who use the noise as shorthand for arrival, rescue, pursuit or escape. The clip works especially well in retro or low-budget style edits, where its rough, mechanical character adds realism and humour without needing any explanation.