I saw a guy on the train the other day doing a cube. He struck me as someone I wouldn't really want to meet. Had an odd, pastey look about him. Like he spent too much time in basements examining wriggly things under dim lights.
But it wasn't the strangest thing seen recently on Rome transit.
I have it on good authority that someone, who looked mentally competent, was seen on a bus reading L'Osservatore Romano.