Anyway, I figured that there would a limit to how often I’d want to run the city streets looking like some kind of demented iceman, so I decided to try out a local gym. No problem, I did a vigorous workout messing around on a mat with a large red ball, and then decided that in fairness to Toronto perhaps I ought to take a shower. I headed towards what I thought were communal showers, but I was a bit distracted calculating how long I’d have to diet before I’d have a body like Robert Downey Jr’s (for about 27 years, I worked out).

Now I did think it was a bit odd that the showers were curtained off, but I was in a state of undress, carrying a small bar of soap, so I wasn’t hanging around. I marched straight through the first gap in the curtain… and found myself in a shower cubicle that must have measured 2ft by 2ft, face-to-face with a similarly naked, and frankly rather startled, man. I squawked, he threw his sponge at me, and well… the whole thing was terribly undignified…

The hotel room was bijou (i.e., tiny), but somewhat surprisingly it did have a bathroom, though with a sliding door and a catch thing you pressed down to open it. Right next to it there was a small wardrobe set into the wall – and it too had a sliding door and a catch thing.

Anyway, it was the middle of the night, and pitch black, and I was awake, and I needed to go to the lavatory. Because I’m a considerate type, I thought I’d do my best not to wake Ann. So I slid out of my bed, tiptoed around her bed towards the bathroom. Very impressively, I managed all this without being able to see a thing. I got to the wall with the bathroom, and felt my away along it until I came to the bathroom door. I thought well I won’t turn on the bathroom light, I’ll open the door, close it, then turn the light on, so it doesn’t wake Ann. So very carefully I slid the door open, took a step inside, and closed the door. I was spectacularly silent. Mice were envious. I heard the click of the latch, and thought “Success! Now I can turn on the light”. So I began to feel around near the door for the light switch, but I couldn’t find it. So I was cursing, and thinking it was ridiculous, it ought to be easy to find. Anyway, eventually I decided to give up, and just feel my way to the lavatory. So I took a step forward – as one would. And smack! – I walked into a wall! I let out a strangled cry, but, you know, I didn’t want to wake Ann, so I controlled myself. And in my head I was cursing the bathroom designer:

“Bloody ridiculous people, they build a bathroom, they don’t put the light switch near the door, and then they build a wall two feet from the door. Completely absurd! I wouldn’t build a bathroom like that!” – that kind of thing. Well you can imagine.

Anyway, so I thought, if I take a step to the right then I’m going to get to the open bit, because I could remember that the lavatory was on the right of the bathroom. So I take a step to the right, and…

Crash! I walk into another wall, but also at the same time almost strangle myself on what turned out to be a load of coat hangers! I was in the bloody wardrobe! In the middle of the night. And it was pitch black. And worst of all, I’d managed to lock myself in there (or so I thought).

So I had to call to Ann for help:

Me: “Help!”

Ann: “What!? What do you want? Go to sleep.”

Me: “Help, I’m stuck!”

Ann: “What do you mean? It’s dark. What do you mean you’re stuck? How can you be stuck!? Where are you?”

Me: “I’m in the wardrobe!”

Ann: “What are you doing in the wardrobe!!?”

Me: “I was going to the lavatory!”

Ann: “In the wardrobe!!!!?”

In fact, my hypochondria went into remission for most of my teenage years. I did have multiple sclerosis briefly one morning, but it turned out to be no more than pins and needles caused by spending the night lying fast asleep on one arm. And then there was glandular fever, but since I really did have that, it doesn’t quite count. Mind you, my self-diagnosis of leukaemia proved to be somewhat wide of the mark.

Unfortunately, this period of relative calm came to an end with a dieting fiasco in my early twenties. I had been getting a bit podgy – too many cakes, rather than liver disease – so I thought a diet was in order. It went well. I lost four pounds in ten days. Very encouraging, except I promptly convinced myself that weight loss meant stomach cancer, and contrived to stuff myself silly over the next week just to prove that I could put the weight back on again. I could. In spades.

This kind of madness has continued off and on for the last twenty years. But recently it has taken a disturbing new turn. For I have discovered that the internet is the hypochondriac’s best nightmare. It all started with a game of squash, heat exhaustion and a doctor’s visit.

“You’ve overheated,” said the doc, obviously noting my fevered brow.

“Why’s that then?” said I, forgetting that I had just played squash in one hundred degree heat.

“It’s a hot day,” somebody said, rather contemptuously I felt.

And if only things had been left there. But, oh no, the doctor just had to pipe up with, “Well, almost certainly that’s it, though there are some very rare conditions which can cause overheating. But there’s no need to worry about them, and I’m not going to tell you about them anyway, because it’ll only frighten you.”

Well what the hell did he mean by that!? I just had to find out. And that’s when it occurred to me, use Google! So I typed in “hot flushes”. Menopause, it replied. I contemplated this possibility for perhaps somewhat longer than a man in his early forties ought to, but even I couldn’t quite believe that I was going through the change. So what else might it be? Tamoxifen? Nope. A tumour on the thyroid gland? Ah, that was more like it, but they’re usually benign, so not too scary. And then I saw the words guaranteed to precipitate a hot flush in any self-respecting hypochondriac. Pancreatic cancer.

Pancreatic cancer is not an illness which tends to have a happy outcome. So, needless to say, I immediately became convinced that I was suffering from it. But what to do? I was much too scared to do further research on the net. And anyway what was the point in finding out how much time I didn’t have left? And then I hit upon a harebrained scheme. People with fast acting terminal illnesses must notice physical decline pretty quickly. So why not set myself a daily physical test – like 2000 metres on a rowing machine – to see whether I got any worse at it? If in a month I hadn’t, then I was probably home clear.

This wasn’t a very clever plan. Its major flaw became apparent some seven minutes after I had embarked on it. Lying panting on the floor in a pool of sweat next to the rowing machine, I realised with horror that I was going to have to repeat the whole process again, just as quickly, the next day. And then the one after that, and so on for a month. At that rate, more than likely I’d expire with a coronary long before my pancreas shuffled off its mortal coil. But did I let this thought stop me? Not a bit of it. The next morning found me astride the rowing machine, eyes bulging with effort, or possibly hyperthyroidism, desperately chasing the clock. Could I match yesterday’s effort? I’m sorry to report that I could not. The clock worsted me by a clear two seconds. Not a huge amount, admittedly, but an obvious indication that my physical decline had begun.

It occurred to me that maybe I ought to call the doctor’s surgery immediately to inform them of my imminent demise. I wasn’t sure they’d be particularly interested, but I figured at the very least that I ought to cancel my flu jab appointment. I could also update them on a new, rather irritating, symptom that had appeared over the preceding few days.

Twitching. Nope, not some strange desire to sit in a field hoping to catch a glimpse of a stray pigeon, though that would have been bad enough, but rather muscles that twitched. A lot. In fact, rather as if a family of hyperactive moles had taken up residence in my limbs. This was not good for my already frazzled state of mind, since it was turning out to be rather difficult to sleep with Moley and his pals skipping the light fantastick in my calves every night.

In normal circumstances, new symptoms are the lifeblood of a hypochondriac’s obsession. There are, after all, few pleasures in life to match the sweet terror of flicking through Gray’s Anatomy to determine whether the pain you’ve just noticed in your knee is a sign that a vital organ is about to give up the ghost. However, on this occasion, I was not overly worried. It was just muscle twitching, which compared to pancreatic cancer surely could not be too serious. So why not Google it? At least that way I could present my doctor with the bundle of research that he always so appreciates when I want him to confirm a particular diagnosis.

Google unfortunately did not share my optimism about muscle twitching. Admittedly, there was mention of anxiety, caffeine and too much exercise – none of which I took to be particularly life-threatening; and I was fairly certain that something called benign fasciculation syndrome was going to be…well, benign. But none of this compensated for the horror of seeing page after page pop up on motor neuron disease, or ALS as I soon learnt it is called in North America. This really was not the best news. It was unfortunate enough to be suffering from one terminal illness, but to be suffering from two, especially when the second one involves a relentless decline into total paralysis, seemed really to be taking the biscuit.

I’d like to say that I contemplated my fate with equanimity – that I cut a rather noble figure as I calmly reminded loved ones of Epicurus’s maxim that ‘Death is nothing to us’. But the truth is my reaction to this new development was more Woody Allen than Epicurus. I became morbidly obsessed with the twitching of my muscles. I would think nothing of spending whole afternoons staring in horrified fascination at the subcutaneous bubbling my calf muscles in particular seemed determined to torment me with; and the merest suspicion that a previously twitch-free zone had decided to join in with the fun would be enough to provoke copious wailing and desperate entreaties for medical intervention.

I am pleased to report, though, that I retained a semblance of the scientific spirit in the series of strength tests I devised to determine just how quickly I was growing weaker. These included: standing on one leg (personal record – 5 minutes 32 seconds); standing on tiptoes on one leg (1 min 15 seconds); standing on tiptoes on one leg in the dark holding a cup of tea (4 seconds); hopping upstairs carrying a large cat (23 stairs). It is true that these tests did not show any dramatic decline in my physical prowess – in fact, if anything I got better at them as time went on – but I was not reassured. No doubt I had a variant of motor neuron disease that would taunt me with the possibility of remission, or even a cure, only to accelerate wildly the moment I began to think that just perhaps I’d be okay.

Obviously, suffering from two terminal illnesses – though, oddly enough, by this stage I wasn’t spending much time thinking about the pancreatic cancer – it was necessary to inform family and friends that I wasn’t going to be around for much longer. It was with a heavy heart, then, that I broke the news to my parents that their beloved son was unlikely to see out the year. It has to be said that their reaction to this bombshell was somewhat underwhelming. My father barely glanced up from the Daily Telegraph, and my mother muttered something about remembering to cancel the television license. Clearly they hadn’t understood what I was telling them. So I explained about my pancreas, and about the twitching, and how all this was terribly bad.

“Oh yes, that twitching, your father has that, and he’s still alive, more or less,” said my mother.

This was unexpected news.

“Show him your calf muscles, dear!”

My father knows better than to ignore a direct command from my mother, so he obliged by rolling up his trousers. It took a little while for me to pluck up the courage to look at his unadorned lower legs, but when I did, I was stunned to see that his calf muscles twitched every bit as wildly as my own.

This was a staggering revelation. It just seemed impossible – such a coincidence! I gave him what I hoped was a look of immense compassion, and then broke the news that he too was suffering from motor neuron disease.

“Oh well,” said my mother,“could be worse, he could have pancreatic cancer as well.”