Al KeyDa train.

Pulling away from my local station this morning heading towards the city. Everyone in the carriage looks up as this bloke of indeterminate arab origin (almost definitely a terrorist ;-) runs up to the door that has just closed, punches it angrily and then uses some sharp metal object or another to scour the side of the carriage as it passes, making an incredible noise.

Now i've heard of people 'keying' cars, but train carriages? That's taking it to a whole new level!