The General Elections of November 24 1991 will secure a place in Belgian political history. On this 'Black Sunday' one third of the electorate changed party. The traditional parties were heavy losers and the swing was wholly to the advantage of 'Vlaams Blok' and 'Rossem' (a party participating for the first time). Since the election a never ending stream of explanations has appeared. Immediately after the elections the Interuniversity Center of Political Opinion research, located at the Catholic University of Leuven, began a national survey of political attitudes and beliefs among 2,691 Flemish voters. This article explores the reasons for voting for the winning parties. Is it appropriated to speak of protest, disappointment and apathy? The authors expect stable, traditional voting behaviour to continue to decrease in future as a result of loosening ties with the "pillars", the decline of church involvement and the process of individualisation. The article ends with some critical comments on the role of the media as a producer of explanations andlegitimations.