SCP-173 is one of the most recognisable creatures from the SCP Foundation universe, first introduced in early SCP writing and later popularised by horror games and YouTube playthroughs. Sounds tied to SCP-173 spread because its statue design, movement gimmick and instant-kill tension are easy to turn into short jumpscare edits. Online, this kind of clip is still used for horror memes, reaction bait and game montages, much like a FNAF Jumpscare Scream when creators want a quick shock without a long scene.