Stallman was giving a speech in Brazil where they speak Portuguese.  Stallman speaks English and Spanish, but not Portuguese.  The audience was asked whether they want Stallman to present in Spanish (similar to Portuguese) or if he should present in English.  The audience originally preferred English but they over estimated their ability to comprehend English.  Part way through the speech, the coordinator asked Stallman to switch to Spanish.  Stallman then has a meltdown as a result.