There is more than one artist with this name; 3) Slipknot is a jam rock band, based in the US and have existed since the early-mid 90's.
They say that in Berlin, wherever they stick a finger, everything is cool. And museums, and friendly people, the diversity of cultures and just the beauty of the city itself. Those who were there for three days, they say they saw three percent. Its scale strikes from the first step, so do not hesitate to choose a date - feel free to give yourself a few extra days for long walks with the camera turned on and techno parties.