Revellers scuffle for the first free beer in the traditional 1-litre beer mug at the opening of the world's biggest beer fest, the Munich Oktoberfest, at the Theresienwiese in Munich, September 17, 2011. Millions of beer drinkers from around the world will come to the Bavarian capital over the next two weeks for the 178th Oktoberfest, which starts today and runs until October 3, 2011. [Photo/Agencies]

Munich Mayor Christian Ude taps the first barrel of beer during the opening ceremony for the 178th Oktoberfest in Munich September 17, 2011.