Lowlifes: Deception, Passion and Revelation in Union Square: Lowlifes Episode 8 of 10

San Francisco's cable cars run on a continuous wire loop that circles the inner city. The cars grab the cable to go forward and drop it to stop. It's one of the city's big deceptions because to the unwise you'd assume that the cars powered themselves. Untrue. The power comes from a massive engine room at Mason and Washington. The cable cars are impotent............