Economizing rubber: sequence on man working on rear wheel of a car which he has just removed, pulling out ruined inner tube, adding valve to tire and transforming it into a tubeless tire. Shots of a man fitting the tire onto the rim, inflating it and replacing the wheel. After checking the pressure the man, who is dressed as a mechanic, sticks a pick into the tire to demonstrate the self-sealing attributes of the new type of rubber. Final FOLLOW SHOT of the owner of the car (Alexis Nihon) getting in and driving off.