translation.en: I wanted to be part of that, and I kind of sat around at the edge going, "Hoo hoo!"  Now, incidentally, what they were laughing at was a song which people used to sing, which was based around signs in toilets on trains telling you what you could and could not do in toilets on trains.
translation.zh: 我想成为他们中的一个， 然后我就围坐在边上 跟着那样，“唬唬！” 顺带一提，他们笑的是 一首人们常唱的歌， 那是根据火车上 厕所里的标语写成的歌 旨在告诉你，在火车上的厕所里 哪些事能做，哪些不能做。