Whenever I see wikipedia.org on hn, I know it's going to be something good. So they used to detach cars from moving trains with passengers in them in order to

Whenever I see wikipedia.org on hn, I know it's going to be something good. So they used to detach cars from moving trains with passengers in them in order to keep the express running? Like, in real life and not in a cartoon? Hacker news, indeed.