I had never seen the poster which Dr.Armstrong showed us.
However, today, when I went to Shinjyuku with my elder sister to go shopping, I saw the poster at the station.
I think the poster makes us funny and that is really good.
Most of the manner poster is not funny that is the reason why we don't attract attention to it.
I think we have to more strict about manners and inculcate people's mind that breach of manners is not cool.