In 2005, a Sony Bravia ad filmed in San Francisco featured 250,000 bouncy balls launched down city hills, creating a stunning visual spectacle that gained immense popularity and critical acclaim. The project faced significant logistical challenges, from securing permits to developing an effective launch system, which ended up causing destruction in the vicinity, including damaged cars and homes. Despite the chaos, the ad became iconic and celebrated, with lasting impressions on the city and on those involved, as it highlighted San Francisco's unique atmosphere and creativity in advertising.
https://www.sfgate.com/sf-culture/article/san-francisco-sony-bouncy-ball-ad-20204385.php