Took the tube yesterday and was rather frightened to learn about the derailment on the Central Line (red line). Actually, when I first read it, the gravity of the situation didn't hit me yet. It was only when I stopped to think what it meant, what had happened in previous train derailments, that I got frightened.

Now I learn that there's a similar fault in the Piccadilly Line (dark blue line) trains and that's the line I take the most. Faulty trains, terrorism alerts, raving loonies. Puts you off public transport.