Place it at the reveal in a rider entrance edit, after a whip crack sets the pace and before a shocking sting closes the beat. Keep the surrounding visuals simple so the rider stays the focus, then cut straight to the next scene without adding another effect.
About this sound
This is a short Arab Horseman clip, lasting just under two seconds and filed under horror by the person who uploaded it. It carries a sudden, uneasy charge that makes a listener brace for something to happen next, more startling than playful. The brevity keeps the scare tight, landing as a quick jolt rather than a drawn-out scene.