Sundance Film Festival: why the films will surprise It's fair to say there's a sense of culture shock at the O2"s Cineworld multiplex in east London. It's a place that usually shows mainstream Hollywood product, but this week the Sundance film festival came to town and the Cineworld is the venue for screenings of titles from a far broader range. Some people in Britain suspect Sundance is a festival for limited types of movies: worthy, liberal documentaries or stories of affluent, self-absorbed young Americans. An early sampling of what's on offer this weekend put that canard to rest. Joe Berlinger's bracing documentary Under African Skies (above) traces Paul Simon's triumphant return to South Africa 25 years after he ignored a UN cultural boycott of that country to record his majestic Graceland album with local musicians.