When I was young, I thought what a useful tool a fan was. I can point a fan at myself, and it cools me.
One night, I had a bowl of ice cream. Having to leave the bowl for a few minutes on a hot night, a brilliant idea occurred to me: I can point my fan at the ice cream, and it won’t have melted much by the time I get back.
I returned to the bowl filled by the hope that my idea would maintain my nice frozen treat. I was so wrong. Before me was the most disappointing puddle of vanilla non-ice cream I’d ever seen. It wasn’t even cold. My idea had completely backfired, and it would be several more years before I even understood why.
I drank the cream anyway.