This happened to me once before, but it wasn’t from a traceable source. If there’s a guy on the train who smells bad you usually know who it is, especially if they’re sitting down. That’s often a dead giveaway if there are several seats next to a guy. Also if the guy has long curly hair, greasy looking hair or all of that, a beard and they’re wearing half a shirt with a jacket if that.

Unfortunately I’m still too much of a chicken to switch between train cars and when this incident happened to me I was on a train that then went over the Manhattan bridge meaning that it would be at least ten to fifteen minutes before I would have to chance to switch cars. I should just suck it up and switch between train cars.

I also like the smell description of the first panel.