Tube network down

[![](https://i1.wp.com/photos22.flickr.com/24229398_4d806ffb17.jpg?w=960)](http://www.flickr.com/photos/adders/24229398/ "photo sharing")

Tube network down, originally uploaded by Adam Tinworth.

We all knew it was coming eventually.

But it doesn’t make it any less frightening when it happens.