Sentient Cable Cars

In 2010, San Francisco experienced an electrical anomaly in which three cable cars were reported moving without any passengers and seemingly changing their speed on their own free will. Not many characters took notice of this until one of them stopped at the top of a hill, then took off flying down the road and seemingly intentionally hit a red sedan stuck in the road due to a flat tire. All three inside were killed within seconds. Characters who witnessed this event say that - to this day - they have horrible memories of hearing the crunching of bones and the shattering of glass.

Footage
Only two surviving photos remain of the event.