Pretty much as soon as it got dark, it started to teeter on a balance between peaceful and aggressive, and with a bit of police provocation it soon kicked off.
At one point a riot policeman punched my camera. However, apart from that, the police let the photographers (some were wearing hard helmets to protect from flying bottles!) get as close as they wanted - they had to.
Whenever an arrest was made, the police would ring the criminal / victim so that the "paparazzi" couldn't see how he was being treated. I saw a police man pushing his hand over or into a young guy's eyes.
As soon as it got dark, the riots started.
It's called Devil Mountain because it is built on top of a pile of rubble from the war, which is hiding a Nazi training centre that was too hard to demolish. The Allies then found that it had really good radio reception, so a permanent base was built at the top.
We climbed the wrong hill at first, and had to go back down and start again, because we couldn't see due to it being in a forest.