Music box melodies have long been linked online with dolls, puppets and haunted toys, because their sweet, mechanical sound turns unsettling in a horror context. Short clips like this one circulate on soundboards and in video edits, where creators need an instant cue for something cute that is not quite safe. It is especially popular in horror game clips, puppet animations and Halloween-style shorts, where a few tinkling notes can set the mood faster than dialogue. That simple, recognisable contrast keeps it in regular use.