Fight Back to School (1991)

The film that made Stephen Chow's nonsense comedy the biggest thing in Hong Kong. Chow plays a washed-up police officer sent undercover as a student at an elite school to recover a stolen revolver, and the joke is a grown man failing at exams, crushes and teenage politics. The finale turns to guns and hostages, but the reason to watch is Chow and Ng Man-tat's double act, which Gordon Chan's film builds into its own little world. It ranks among the highest-grossing local films the territory ever produced.