I use to live in London and riding the tube in the summer was so nasty. It was hot, humid, stagnate air, wall to wall people who jam packed each car.... The smell... There always seem to be one bastard who would fart.... sulfur type fart.
In essence, it was hell.
Sounds about right.
Boy, looking back, I HATED IT.
I finally caved in and paid for the express bus.