Yesterday I made an amazing discovery! I was typing my history book and I typed the word "helmet", you know, a protective head covering. But all my life I've spelled it with an 'n'; "helment". So the spelling checker made a red line under it, which means it was spelled wrong. I sat there for about a minute scratching my head and wondering how in the world it could be wrong, but I right-clicked on it and it said "helmet" so I clicked on it. I later looked it up in the dictionary and realized that I'd spelled it wrong all my life! Hahaha.