Subways were not made w the idea that ghetto monsters would be shoving people in front of a train.
This is not the first nor will it be the last time someone falls or is pushed in front of a train whither above or below ground level. Subway trains have been around almost as long as trains so there is a great deal of experience in dealing with people falling from platforms.
Most subway systems do not have trains hurtling in to or through stations where there are people waiting,i .e. the train slows down even before it enters the station.
I dont know this particular station but from the photo it is difficult to figure out why the train was going so fast that it could not break in time.
Again from the photo, station platform seem oddly empty apart from the man attempting to climb out and the photographer (whom of course we dont see in this picture)
Regardless of how the man fell in to the track well it appears this particular subway system has inadequate safety proseedures.
That is more frightening than the random act of one crazy person