platform hand cleaner
Upon arriving on a subway platform, there's nothing I enjoy more than washing my hands of their daily grime, getting them all lovely and clean for my journey to work/home, depending on my direction of travel.
I'm hoping they might soon place urinals next to the sinks, so I'll be able to have a leak at the same time as keeping a look out for the arrival of my train. If it comes early, I'll be able to break my flow in order to board the train. Although it's pretty hard to stop once you've started.
It may look like he's having a slash, but he is in fact attending to his hands.