This was only a few years ago, I am ashamed to say. I was living in a 1920's era apartment with a tiny, completely unventilated kitchen. I was simmering a leftover chicken and some vegetables in water to make stock. It was Sunday, so I was fielding phone calls, watching a movie and doing laundry at the same time. I accidentally let the stock boil all the way down to the bones, so I just filled the pot up with water and tried again. And again I forgot and let it boil down to nothing. When I finally returned to the kitchen, I was peering into the pot to see what had happened when I felt a drop splash on my head. I looked up, and found that so much stock had evaporated and condensed on my ceiling that it had literally begun to rain chicken broth on my head. The broth was also dripping down all the walls, resembling a horror movie set. Cleanup took a long, long time.