Woopsie-daisy...

It is amusing, but I think if I saw someone that inebriated near the edge of the platform, I'd try to steer them away until the train stopped in the station.
Amazingly, though, in all the hundreds of hours I've spent on subway platforms, I've never seen anyone quite that stumbling drunk. On the trains, yes... but not on the platform.

She's also very lucky she didn't make contact with the 3rd rail... the way she was thrashing around down there, it might have happened. 700+ volts will do more than curl your hair! :o