The quote 'Get three coffins ready' is a legendary threat from Clint Eastwood in 'A Fistful of Dollars.' To give the Spaghetti Western its Spanish-influenced rhythm, Ennio Morricone utilized castanets. Castanets are a percussion instrument (idiophone) consisting of a pair of concave shells joined by a string, clicked together with the fingers. Usually associated with flamenco dancing, Morricone used them to create a sense of tension and 'rattlesnake' percussion. This choice highlighted the film's setting near the Mexican border and added a sharp, rhythmic punctuation to the gunfights. The castanets became part of the iconic 'Morricone sound,' proving that small, handheld percussion can define the atmosphere of a movie legend and the rhythmic pace of its most famous dialogue.