Zack D Films built a huge following with short animated explainers about strange injuries, science and historical oddities, often told in a deadpan voiceover. The dancing plague refers to the famous 1518 outbreak in Strasbourg, where people reportedly danced for days without stopping. Clips from his videos are frequently reposted as memes because the serious narration clashes with surreal animation. This one became a reusable reaction sound for out-of-control dancing and bizarre facts, staying popular because almost any chaotic movement looks funnier under a calm historical explanation.