Ví dụ công khai
Early on in the model year [1968] Pontiac experienced some production problems [in producing polyurethane bumpers] regarding fit, matching paint color, and bonding the material to the base metal. As a result, 2,108 1968 GTOs left the factory with chrome bumpers borrowed from the LeMans. These cars had a special option on their order sheets called "Endura bumper delete." Everyone wanted the Endura bumpers and no one ordered that option of his or her own free will. As soon as Pontiac worked out the production problems the chrome bumpers disappeared for good and "Endura bumper delete" disappeared from the option list.