Colin always walked gingerly through his garden. Years ago (in fact it was getting on for a century ago) the site of his house and garden was an old munitions storage during the war. Colin always imagined that one day he’d step on a mine or something and be blown to smithereens.
Naturally the site had been cleared by professionals a long time prior to his even buying the land and building a house. But the thought didn’t go away. In fact, the old man who ran the local knick-knack shop told Colin that he didn’t reckon the land had been cleared properly. There were old mines scattered all over everywhere just like this one. And he showed Colin a real live mine that he had found and kept high on a shelf out of reach in his store.
Life trundled on. Colin’s wife thought Colin was silly. “Why walk gingerly through your garden when you know it’s cleared of mines? It’s time you grew up and got over this childish nonsense.”
Anyway, Colin got tired of the constant nagging. Which is why the mine kept high on a shelf in the knick-knack store came in handy.