Superstar Rajinikanth suffered a minor injury on the sets of his upcoming Tamil science-fiction action-thriller 2.o. According to a source he fell and hurt one of his knees. The incident occurred on late Saturday evening. Rajinikanth fell while filming a crucial scene and hurt one of his knees. He was taken to Chettinad hospital where the superstar underwent treatment for about half an hour. Later he returned home a source from the film's unit said. Multiple sources have confirmed the superstar is absolutely fine.In a video released by Rajinikanth's manager Riaz K. Ahmed on his Twitter page he is seen exiting his caravan waving