Linha 4 Amarela is the fourth line of the São Paulo Metro in Brazil, operated as the Yellow Line and opened in 2010 between central stations such as Luz and Paulista. Its automated station announcements became familiar to millions of daily passengers, and short recordings of the line name later circulated online as a soundboard clip. Brazilian creators reuse the announcement out of context for commute humour and São Paulo references, where the formal transit voice contrasts with everyday or absurd situations in edits and chats.