Five Nights at Freddy's 4, released in 2015, moves the horror series into a child's bedroom, where the player listens at two doors, checks the closet and the bed, and must return to bed before the nightmare animatronics attack. The running sound comes from that tense loop of checking and retreating, which is why fans recognise it even without any dialogue. As short gameplay clips spread through edits, streams and meme videos, the dash back to bed became shorthand for a last-second escape, and it still works because the sound alone suggests danger is already close behind.