My brother P J was notorious for his obsession for unscrewing things.
One particular day when I offered to take the baby out for a stroll in his pram, I suddenly learned how lethal P J’s tinkering could be. It was not until the pram was angled off the horizontal, literally when I took it off the footpath’s kerb in order to cross the road that I discovered what he had been up to!
At that point the body of the pram parted company with its wheels; P J had undone the screws fixing it in place.
My mother was angry with me for abandoning the pram outside without offering an explanation. It was only through the good offices of my father that I escaped with a mere ‘telling off’.