A few years ago, my son spotted a remote control helicopter out the back of a charity shop as we dropped off some clothes. He immediately wanted to buy it.
Unfortunately, the bloke at the store said he couldn’t sell it to us. Because it was a potentially dangerous, untested electronic item, he was supposed to throw it away.
However, he mused, perhaps he could trust us to take it and throw it away for him? Wink wink nudge nudge.
My son joyfully brought the helicopter home, powered it up and launched it high in the air on its maiden flight. It span briefly at its apex, burst into flames and plummeted to the ground, smashing on impact.
Far from being disappointed, he was thrilled by the unexpected outcome.