This line comes from Gunnery Sergeant Hartman, the drill instructor in Stanley Kubrick's 1987 film Full Metal Jacket, played by R. Lee Ermey and famous for his relentless, profanity-filled inspections of new recruits. In the Italian dub, his shocked question about an unexpected discovery became a standalone clip shared by Italian-speaking meme creators. It spread because the delivery is instantly recognisable even without context, and it now functions online as a shorthand for disbelief at something strange, gross or inexplicable.