Prison on Fire (1987).
While trying to fend off some punks ripping off his father’s shop, Lo Ka Yiu accidentally pushes one into the path of an oncoming bus. He gets three years for manslaughter. After arriving at prison, Yiu is befriended by hard-timer Ching. Soon after, the prison is thrown into turmoil and the authorities clamp down – hard.
Directed by Ringo Lam. Starring: Chow Yun Fat & Tony Leung. (93mins).