Toothless is the Night Fury dragon and main animal character in DreamWorks' How to Train Your Dragon films, first released in 2010. The dancing version is a short animated loop that spread widely on TikTok, YouTube and meme pages, usually set to this upbeat looped music. Creators detached the dance from the films and began placing it over unrelated happy moments, pets and game clips. Its simple loop, recognisable character design and carefree movement made it easy to reuse, helping the meme stay popular as a reaction to joy and success.