In the mid-1970s disco ruled and roller skates were so big they made science fiction movies about them, in fact the movie Rollerball is still a huge cult film. Well now roller skates are back in a big way. Forget inline skates: if you think it is “easier” because you have four wheels, well think again! This video gets into a roller skating class in Berlin whose teacher is trying to change put Berlin clubs on wheels! Viel Spaß! Copyright: Deutsche Presse Agentur [The German Press Agency]