The Private Eyes ★★★★

1) The detective agency is called "The Mannix Detective Agency" and at one point Sam Hui dresses up like Columbo.

2) Despite this not being a "Martial Arts Comedy" it's still a Golden Harvest movie made in 1976 and there's still plenty of kung fu being thrown around.

3) This movie may be ground zero for the "guy using sausage links as nun-chucks" gag.