Random pointlessness

So I keep this box fan in a window in the living room. Since I have no air conditioning, it's how I (try to) keep myself and the house cool during the summer. Now that the weather has been cooling off, the fan has been turned off, but it's still by the window and I leave the window open for the fresh air. From time to time, the wind comes in through the window hard enough to lazily spin the fan blades around. I really like when that happens.