The Stupor Salesman

The Stupor Salesman is a Warner Bros. animated cartoon of the Looney Tunes series, directed by Arthur Davis, written by Lloyd Turner and Bill Scott, and released on November 20, 1948. It stars Mel Blanc as the voices of Daffy Duck and Slug McSlug, an infamous bank robber.

Plot summary
Slug McSlug, a notorious criminal, is chased by police after successfully robbing the Last National Bank. He reaches his country hideout, where he is promptly visited by an uninvited Daffy Duck, who is a door-to-door salesman of a variety of items. McSlug slams the door in Daffy's face, but Daffy doggedly persists in his efforts to sell something to McSlug, raising the ire of the wanted criminal. McSlug opens fire on Daffy, who conveniently is wearing a sample of his company's bullet-proof vests. "Guaranteed to get your money back if it doesn't work!" says Daffy. When Daffy turns on the gas of McSlug's stove to demonstrate the igniting power of his sample lighter, McSlug literally throws Daffy out and tries the lighter himself, which blows the hideout and McSlug sky-high. The victorious Daffy yells toward the sky: "Hey, bub! You need a house to go with this doorknob!"[2]