The Matuca screamer belongs to the long tradition of screamer audios circulated on WhatsApp, where a harmless looking voice note hides a sudden loud noise. The name Matuca is used by Brazilian users sharing the clip in groups, though its original recording source is not documented. It spread the same way other WhatsApp prank sounds do, forwarded from chat to chat and saved to soundboards for quick reuse. Its lasting appeal is simple timing: it needs no setup, translation, or context, so the scare works even for listeners who have never heard it before.