[Gibbon1]

I once saw an young man with some sort of psychosis so distracted that he walked into traffic at 5th and Folsom. And didn't realize it until he was halfway across.

Other hand a friend of mine with psychosis threw himself in front of a BART train.

Also with a train there nothing to engineer can do since the coefficient of friction between the steel wheels and track is like 0.05 vs close to 1.0 for rubber and asphalt. The engineer can't stop the train in time. These accidents take a bad toll on train engineers.