This sound comes from SCP: Containment Breach, the indie horror game based on the SCP Foundation universe, where SCP-173 is known for killing when not being watched. The game released in 2012 and helped popularize the creature far beyond niche horror circles. The neck snap effect became memorable because it is tied to one of the game's most iconic threats: blinking at the wrong time. It still appears in horror compilations, SCP videos and edits that use abrupt death audio much like a FNAF Jumpscare Scream.