My leg didn't just feel as if it had been broken, it felt as if it had been cut in half, I felt his left toe behind my left foot and stamped on it with every vicious ounce of power left me but when my foot came down his toe wasn't there any more. All I had on my feet was a pair of thin rubber swimming moccasins and the agonising jar from the steel deck plates shot clear to the top of my head. I reached up my hands to break his little fingers but he knew all about that too for his hands were clenched into iron-hard balls with the second knuckle grinding into the carotid artery. I wasn't the first man he'd strangled and unless I did something pretty quickly I wasn't going to be the last either. In my ears I could hear the hiss of compressed air escaping under high pressure and behind my eyes the shooting lines and flashes of colour were deepening and brightening by the moment.

What saved me in those first few seconds were he folded hood and thick rubberised canvas neck ruff of the scuba suit I was wearing under my coat. But it wasn't going to save me many seconds longer, the life's ambition of the character behind me seemed to be to make his knuckles meet in the middle of my neck. With the progress he was making that wouldn't take him too long, he was half-way there already.

I bent forward in a convulsive jerk. Half of his weight came on my back, that throttling grip not easing a fraction, and at the same time he moved his feet as far backwards as possible — the instinctive reaction to my move, he would have thought that I was making a grab for one of his legs. When I had him momentarily off-balance I swung round in a short arc till both our backs were towards the sea. I thrust backwards with all my strength, one, two, three steps, accelerating all the way. The Nantesville didn't boast of any fancy teak guardrails, just small-section chain, and the small of the strangler's back took our combined charging weights on the top chain.