Dirty Work is a Laurel & Hardy sound short film released 25 November 1933.
Mad scientist, Professor Noodle has just developed a rejuvenation solution that reverses the aging process. Stan and Ollie arrive to sweep the chimney. Ollie climbs onto the roof and Stan stays below at the fireplace. Stan begins to shove the broom up the chimney and knocks Oliver backwards and down through the skylight. Oliver climbs back onto the roof and begins to pull up the broom. Stan has hung on to the broom and arrives at the roof. Oliver drops him back down through the chimney. Stan doesn't have enough extensions for the broom and decides to use a rifle to shove it the last part of the way. The gun goes off nearly shooting Oliver. Stan decides to go up to the roof, and as he opens the skylight he knocks Ollie off the roof and down onto a greenhouse. Ollie finally falls down the chimney dislodging many bricks, sending a cloud of soot all over the living room and onto the butler, and damaging the piano. The butler says something about an electric chair, and stalks out. Stan and Ollie start to clean up the soot around the fireplace. They become distracted and Stan shovels the soot into Ollie's trousers.
Professor Noodle decides to test his rejuvenation solution. He puts a duck in a vat of water and adds a drop of his solution. The duck turns into a duckling. The professor is excited and decides to show Stan and Ollie his discovery. He puts another drop of his solution into the vat and the duckling turns into an egg. When the professor leaves the room to fetch and rejuvenate the butler, Stan and Ollie decide to test the solution for themselves. Stan accidentally knocks Ollie and the solution into the vat. Ollie emerges as a chimpanzee. He still repeats what he has said multiple times throughout, "I have nothing to say."