Today was going to be an excursion to Fremantle. The train from Perth to Fremantle was quite full, when I sat down on a single seat an older rotund gentleman promptly elbowed me in the chest and verbally complained I had touched him and he wanted his space. Obviously this guy has never been on a train in London or Tokyo. But I got up, apologised and walked away, this old guy was not a physical threat.
A few stops later the old guy got off, then a plain lady sat in his place. A guy then sat in the seat I had occupied next to her and a argument promptly started between them with the lady loudly breaking up with the guy.
I deduced that anyone who sat down in that particular seat was not going to have much luck.