When I was younger I used to imagine this really scary thought. You know how the earth is spinning? Well, imagine if it started spinning much, much faster. So that days and nights were only a few seconds long? That means it would be day, night, day, night, day, night, and the sky would be changing colours from blue to black, black to blue, blue to black. Hopefully it would be a cloudy day so you wouldn't see the sun SHOOTING across the sky. Not only would that be BLINDING, but it also would be TERRIFYING, the would be too much light and it will look like some sort of asteroid. Look at the sky right now and imagine that happening.