On Saturday, hundreds of people froze in place amidst the pouring rain and herds of tourists at the cable car turnaround near Union Square at Powell & Market at the San Francisco freeze. The participants of the SF freeze froze in place for several minutes at a time and then unfroze at the sound of a horn.
Some video clips from the San Francisco freeze can be seen here.
The SF freeze was inspired by Improv Anywhere's Frozen Grand Central station event in NYC. The original NYC freeze can be seen here.