As I have always expected to do, but have never yet done, I missed my footing at the top of the escalator, and my desire to outstrip my enemies was realised beyond my wildest hopes as I crashed, by a series of petrifying somersaults, down the entire flight, to be belched forth like a sausage from a machine at the bottom.

Tattered, torn and in unspeakable agony I picked myself up and found my steering-gear so damaged that I could only move sideways, crab-fashion, and in this manner I crawled on to the platform just as a train was beginning its exit.

I make a leap for it. The gates crash to! Am I inside them or out? Neither. I am pinned there with the first half of my body struggling inside the car while the second half protrudes over the fast-receding platform.

I remember how in my agony it flashed across my mind that I would never again slay a wasp with my fork.

I must have been pulled into the car just in time to stop the tunnel (which is a dreadfully close fit) from bisecting me, for the next thing I remember was being dropped into a corner seat and severely admonished by the guard for getting into the train whilst it was in motion.

I was now a quivering and shapeless mass; nobody pitied me, nobody helped me, so loathsome a spectacle did I present.

Of course the train passed my station, and at the next I was thrown out like a mail-bag, to be trodden on by massed formations of travellers fighting to enter and leave the car by the same door at the same time.

When the multitudes had dispersed and I was alone, by superhuman efforts I contrived to wriggle on my stomach to the foot of the ascending stairway, but not having sufficient strength to wriggle off on arrival at the top, my long-dreaded horror of being sucked under the barrier, where moving stairways disappear, was realised.

By now immune to pain, I regarded the next process (akin to being passed through a mangle) as child's play. To my amazement, after a few minutes amongst giant cog-wheels, I again found the light on the down-going staircase, which precipitated me to the spot from which I had started.

Having thrice performed this revolution, by which time I was as flat as a pancake, I was eventually scraped off by a porter and upbraided for joy-riding.