Just inside the enterance to arena for Wacken 2009, after some rain, and where most of the 75,000 crowd had poddled through in the previous two days, the ground was covered in a layer or sloppy thick mud, beer and piss. Several people from the crowd choose to fight each other in the mud, rolling around and forcing each other into the dirt, this is what happened, and none of this was organised by the festival, it just happened.