Germans are having a hard time believing what happened Tuesday night in Brazil. Sure, they are celebrating their country's 7:1 win over the home favorites in a World Cup semifinal -- street musicians on Berlin's S-Bahn are playing "for the German champions" today -- but newspaper headlines speak of incredulity rather than sheer joy. "Unimaginable, incomprehensible, inconceivable," said the headline in the daily Frankfurter Allgemeine. "Is it really true?" wondered Munich's Sueddeutsche Zeitung.