This pic is definitely cool!
I happened to be at the Smart Corner building, the location of the City College trolley station, when a historic car belonging to the Silver Line came through! It was servicing the downtown loop.
This shiny, beautifully restored Presidents Conference Committee (PCC) trolley car was built just after the end of World War II. A whole fleet of electric trolleys like this one traversed San Diego until 1949.
Here are more pics of the same trolley taken on different days: