SAN FRANCISCO - JULY 12: San Francisco Municipal Railway (MUNI) cable car gripman Ken Lunardi rings his way towardsa second place finish at the 45th annual Cable Car Bell- Ringing competition July 12, 2007 in San Francisco. Leonard Oats captured the 2007 cable car bell-ringing title by playing a 30 second tune on a cable car bell. (Photo by Justin Sullivan/Getty Images) *** Local Caption *** Ken Lunardi
Cable car operators from across the City descended on Union Square for the 48th annual Cable Car Bell Ringing contest.
The annual celebration of everything "ding" pits Muni conductors the chance to show off their bell ringing skills. The one with the "sweetest" ding will win the Grand Prize Ball.
San Francisco's famed cable cars use the bells in daily life to announce a stop or its presence.