Since I live so close to work, I went home for lunch today and decided to make some toasted cheese-topped open sandwiches. I turned the oven to preheat, and began slicing cheese so forth. A minute or two later, I opened the oven, which had apparently suffered from a lack of oxygen: the gas was on, but not lit, until I opened the door. Then, air rushed in and the gas could ignite. Along with most of the hair on my forearms. Whoo.