My "office" is the corner of the living room. That means I have had 9 years to learn to tune out most activities not directed at me, so I can focus on whatever I'm doing, at least for a little while. I don't always succeed, and I regularly fantasize about having a Real Office with a Door on It, but it's what I have and it usually works.
This morning I was reading my traditional online stuff--keeping up with a lot of you is part of it. And out of the corner of my eye I saw Son #3 run to the kitchen, come back with a glass of water, and toss the water out the window.
Apparently he had set a piece of paper towel on fire, in the dining room not 10 feet from me. He threw the paper towel out into the snow, but it missed the snow (hard to believe this is possible) and landed on a pile of dry leaves. He saw the fire growing and put it out with the glass of water.
I am a bit mortified that all this could happen and I would notice only the splash at the end. He, however, is glad that rather than having a conniption like a decent mother, I just asked him to refrain from setting our house on fire, in future, as we still need it.