The Errand Boy (1961)

When Mr. T.P., president of Paramutual Studios, hires clumsy Morty Tashman (Jerry Lewis) to be "The Errand Boy" and to spy on his fellow employees in an efficiency "sting" operation, he never realized that he was developing the recipe for disaster. It seems that wherever Morty goes some hilarious mishap occurs. Even Morty trying to have lunch becomes a wild misadventure. Having a car washed is even wilder.