A teenager was fighting for his life in hospital after choking on a fish ball in Shau Kei Wan. The 13-year-old boy, surnamed Cheung, collapsed as he was eating the fish balls and siu mai he had just bought from a stall in Hing Tung Shopping Centre, Yiu Hing Road, shortly after 3pm. He was taken to Pamela Youde Nethersole Eastern Hospital and was in the intensive-care unit last night.