Inutilismo is the online name of Brazilian YouTuber Lucas Vinicius, who built a large audience with comedy, challenges and especially music-focused videos where he attempts songs and instruments with little preparation. Short clips tied to his channel circulate widely on Brazilian social media and messaging apps, detached from the original videos and reused as reaction sounds. This musical snippet survives in that form because it is instantly recognisable to fans, brief enough to drop into any edit, and flexible enough to signal a musical joke is starting.