The clip circulates on soundboards under the Portuguese title sons misteriosos, meaning mysterious sounds, and is tagged for aliens and UFOs. Its appeal follows a long online tradition of using eerie tones for paranormal reveals, a style many viewers associate with X files and other mystery shows about unexplained phenomena. Short, wordless and instantly recognisable in context, it spread as a reusable reaction sound rather than as a full track, letting creators signal mystery, suspicion or a supernatural twist without explaining the joke or building a longer soundtrack for a very brief moment.