After Darryl Dawkins shattered two basketball backboards during his 1979–80 NBA season, the CBA implemented a collapsible hinged rim. The design was chosen from 10 prototypes that were set up in a New York City high school gymnasium in the summer of 1980. Unidentified college basketball players were asked to try to break the rims and the three strongest designs were chosen for a trial run in the CBA. All three rims broke away from the backboard and snapped back in place. The NBA announced they would adopt a similar model before the 1981–82 season.