The audio comes from a clip of Brazilian fitness creator Leo Stronda tenderizing meat while repeating the playful grunts han and hein, a moment that fans clipped because the rhythm turned an ordinary task into a joke. Shared as a short meme sound, it spread through reaction videos and edits where creators reuse the grunts to score effort, cooking and exaggerated confidence. Its appeal is simple: the sounds are short, instantly recognisable and funny on their own, so they keep working in new videos long after the original clip.