Darth Vader first appeared in Star Wars in 1977, and his laboured mechanical breathing became one of the most recognisable sounds in cinema almost immediately. It was designed to suggest the life-support system inside his black armour, keeping him alive after his injuries, and it returned across the original trilogy and later Star Wars films, series and games. Online, the four-second clip spread as a shorthand for menace, authority and dramatic entrances, which is why editors still drop it into memes, trailers and reaction videos decades later.