I spent some days in Brussels, Belgium and got to know this beer called "sudden death" - it is bottled like champagne!
This is the explanation for its most unusual name:
"In the early 20th century, many customers played the game of dice. At that time, the loser was given the name "death". And when the game was to give way to work, the players ended with a final section called “Sudden Death”. As this game became very popular the beer was given the name “Mort Subite”, which is now served as the Lambic."
Lambic is a very distinctive type of beer brewed traditionally in the Pajottenland region of Belgium (southwest of Brussels) and in Brussels itself. Lambic is now mainly consumed after refermentation.
Unlike conventional ales and lagers, which are fermented by carefully cultivated strains of brewer's yeasts, lambic beer is produced by spontaneous fermentation: it is exposed to the wild yeasts and bacteria that are said to be native to the Senne valley, in which Brussels lies. It is this unusual process which gives the beer its distinctive flavour: dry, vinous, and cidery, usually with a sour aftertaste.