File this under: I'm not making this up.
According to a newspaper article dug up by TwoBells (Joe Lacey) on the SFMuni history list and confirmed by other list members, Cable Cars apparently caused one San Francisco woman to become a nymphomaniac. A few weeks after coming to San Francisco in 1964, she was involved in a terrible Cable Car crash which she claims made her go against her Lutheran morals. This in turn made the cable cars more popular (3rd Article). For the whole story you have to read the articles from the San Francisco Chronicle in their entirety below. It's quite hilarious and shows that you never know what could happen on transit or in the court of law.