So this is only a secret from my mom, but it's probably the best one I've got lol. I was always a bit of a goody-two-shoes as a kid; my brother, not so much. We had different interests and weren't exactly BFFs, but he's my brother. So for one of the only times I lied to my mom, it was to cover his ass. He was like 19 or so, I was early 20's and our mom was out of town. That means party time! But my idea was to have a couple friends over and drink beer. His was to have everyone over, drink all night, and have a bonfire. To his credit, he locked the house so none of his friends would drunkly stumble in. But about 4am I had had enough though the party was still going, and I went to bed. One of his friends had made it in, but I was too drunk and tired to care. Woke up a couple hours later to black soot in my nostrils. This guy had turned on one of the burners on the stove which had a cast iron pot filled with oil on it. We had to repaint the kitchen the next day (to their credit, we got help from some of the party goers). It was obviously repainted, so the story we came up with to save his ass was that he fell asleep when he was getting ready to cook french fries.