Two teenagers were reportedly killed when they tried a social media challenge by "surfing" on top of a moving transit train in San Francisco, California. The separate incidents were documented in a report by KTVU-TV. On Sunday morning, at about 9 a.m., a young man tried to ride atop the train .
Serious warnings are being issued following the death of another Bay Area teenager after he reportedly engaged in a dangerous stunt known as "train surfing," in which a person rides on the roof of a moving train.
For the second time in two weeks, a teenager has been killed while surfing on top of a BART train in San Francisco. Now, BART and city leaders are calling for.