René Scholl is a circus artist. When he performs in the ring he has to be completely focussed, and on top physical form. But he's dealing with some serious health issues - he was recently diagnosed with a brain tumour and it's affecting his sense of balance. Then there are practical concerns - audiences are dwindling. For René and the circus, the future is uncertain. Survival Act - Life under the Big Top A Report by Catherine Wenk und Matthias Wiesel