I was at my grandparents' house recently, and nothing odd was happening, but then a sound came sort of like a ton of snow fell off the roof. Of course this was around the beginning of autumn. Everyone else but me also felt the house shake. So apparently, several streets down in whichever direction, a gasline leaked and a house exploded. Whee! It was a group of college kids living there, and nobody died or anything. Which is rather extraordinary.