What really happened to Brazil yesterday night? Can someone please tell me.

What the f**k happened yesterday night? Brazil played against Germany and lost 7-1 to Germany in the semi-finals of the 2014 World Cup

I still cant figure out what really happened to Brazil because they didn't play to our expectation and nobody believed its was going to end that way.I felt so sorry for the Brazilians yesterday night because they were all weeping.